Mexico — Rules of Origin & FTAs

The Tratado entre México, Estados Unidos y Canadá (T-MEC, known as USMCA in the United States and CUSMA in Canada) is Mexico's predominant trade agreement by volume and governs preferential tariff treatment for goods originating in North America. The T-MEC entered into force on July 1, 2020, replacing the North American Free Trade Agreement (NAFTA). The treaty text was published in Mexico's Diario Oficial de la Federación (DOF) on June 29, 2020.

Origin criteria under Chapter 4. A good qualifies as originating—and thereby eligible for preferential tariff treatment—if it meets one of the criteria set out in T-MEC Article 4.2:

• Wholly obtained or produced entirely in the territory of one or more Parties under Article 4.3 (e.g., minerals extracted, live animals born and raised, harvested plants);
• Produced exclusively from originating materials from one or more Parties; or
• Produced in the territory of one or more Parties using non-originating materials that satisfy the applicable product-specific rule of origin (PSRO) listed in Annex 4-B, which may require a tariff-shift, a regional value content (RVC) threshold, or both, and may specify prohibited non-originating inputs for certain goods.

RVC is calculated under one of three methods specified in Article 4.5: the net-cost method (required for automotive goods under Chapter 4 Appendix and certain other goods), the transaction-value method, or the build-down method. Automotive goods face the most demanding origin requirements in the agreement: passenger vehicles and light trucks must achieve 75% RVC (phased in), and a new Labor Value Content (LVC) requirement mandates that 40–45% of vehicle production (by value) be performed by workers earning at least USD 16 per hour.

Administering authority and Uniform Regulations. In Mexico, the Secretaría de Economía (SE) is responsible for trade-policy implementation, and the Servicio de Administración Tributaria (SAT)—specifically its customs authority (autoridad aduanera)—enforces origin requirements at import. On June 30, 2020, SE published in the DOF a Resolución que establece las Reglas de Carácter General relativas a la aplicación de las disposiciones en materia aduanera del T-MEC y sus anexos (General Rules Resolution), which sets out the customs procedures for claiming preferential treatment, certification-of-origin formats, and verification protocols.

Article 5.16 of the T-MEC required the three Parties to adopt Uniform Regulations for interpreting and administering Chapters 4 (Rules of Origin), 5 (Origin Procedures), 6 (Textiles and Apparel), and 7 (Customs Administration and Trade Facilitation). The Free Trade Commission adopted Decision No. 1 on the Uniform Regulations on June 1, 2020, and an updated Decision No. 2 on May 18, 2021. Mexico published the updated Uniform Regulations in the DOF on August 13, 2021. These Uniform Regulations define critical terms—e.g., "net cost," "transaction value," "applicable change in tariff classification"—and provide detailed calculation methods and tolerances (such as the de minimis rule at Article 4.7, allowing up to 10% non-originating content by weight or value for most goods, and a tighter 7% de minimis for certain textile and apparel items).

Entry into force and sunset review. The T-MEC has a 16-year initial term from July 1, 2020. Article 34.7 mandates a joint review by the three Parties on July 1, 2026 (six years after entry into force), at which each Party must confirm in writing—at the level of head of state or government—its intent to extend the agreement for another 16-year term. If any Party declines, the agreement will be reviewed annually for the following 10 years, and any Party may withdraw on six months' notice under Article 34.6.

Source: Tratado entre México, Estados Unidos y Canadá (T-MEC), Diario Oficial de la Federación, June 29, 2020

Source: Resolución que establece las Reglas de Carácter General relativas a la aplicación de las disposiciones en materia aduanera del T-MEC, DOF, June 30, 2020

Source: Acuerdo por el que la Secretaría de Economía da a conocer las Reglamentaciones Uniformes, DOF, August 13, 2021

Mexico operates one of the world's most extensive preferential-trade networks. According to the Secretaría de Economía (SE), Mexico has 14 free trade agreements covering 52 countries, plus 30 bilateral investment treaties (Acuerdos para la Promoción y Protección Recíproca de las Inversiones, APPRIs) and 9 limited-scope trade agreements (Economic Complementation Agreements and Partial Scope Agreements) within the Latin American Integration Association (ALADI) framework. The SE maintains the authoritative registry of trade agreements under its Sistema de Información de Tratados Comerciales Internacionales (SICAIT), as required by Article 29, Section VI of the SE's Internal Regulations published in the Diario Oficial de la Federación on November 22, 2012.

Geographic distribution and major agreements

Beyond the USMCA (T-MEC, in force July 1, 2020), Mexico's FTA portfolio includes agreements across the Americas, Europe, and Asia-Pacific:

Latin America: FTAs with Chile, Costa Rica, Bolivia, Nicaragua, the Northern Triangle (El Salvador, Guatemala, Honduras), Uruguay, Colombia, Peru, and Panama. Mexico is also a founding member of the Pacific Alliance (Alianza del Pacífico), a regional-integration platform among Mexico, Chile, Colombia, and Peru that seeks liberalization of goods, services, capital, and persons and coordinates joint trade promotion. The Pacific Alliance accounts for approximately 43% of Latin America's GDP.

Europe: FTAs with the European Union (27 member states; decision of the EU–Mexico Joint Council effective July 1, 2000, modernized under a Global Agreement in 2020) and the European Free Trade Association (EFTA: Iceland, Liechtenstein, Norway, Switzerland; effective July 1, 2001). The EFTA agreement was negotiated on the basis of the EU FTA template.

Middle East: FTA with Israel (effective July 1, 2000).

Asia-Pacific: The Comprehensive and Progressive Agreement for Trans-Pacific Partnership (CPTPP, known in Mexico as Tratado Integral y Progresista de Asociación Transpacífico or TIPAT). The CPTPP was signed by Mexico on March 8, 2018, in Santiago, Chile, approved by the Mexican Senate on April 24, 2018, and entered into force for Mexico on December 30, 2018. The agreement has 11 member states: Australia, Brunei Darussalam, Canada, Chile, Japan, Malaysia, Mexico, New Zealand, Peru, Singapore, and Vietnam. For Mexico, the CPTPP provides FTA access to six Asia-Pacific economies with which it did not previously have comprehensive FTAs: Australia, Brunei, Malaysia, New Zealand, Singapore, and Vietnam.

ALADI Economic Complementation Agreements and Partial Scope Agreements

In addition to comprehensive FTAs, Mexico has signed 9 limited-scope agreements under the ALADI framework, which was established by the 1980 Montevideo Treaty. These Economic Complementation Agreements (ACEs) and Partial Scope Agreements cover specific sectors or product lines and typically do not include the full trade disciplines (services, intellectual property, government procurement, investment) found in comprehensive FTAs. Examples include ACE 6 (Argentina), ACE 53 (Brazil), and ACE 55 (Mercosur).

CPTPP as a "next-generation" agreement

The CPTPP is described by SE as part of a long-term strategy to complement USMCA and reinforce the Pacific Alliance. The agreement includes commitments on digital trade, state-owned enterprises, regulatory coherence, intellectual property, labor, environment, and services that go beyond traditional WTO disciplines. Several provisions in the USMCA were drawn from the original Trans-Pacific Partnership (TPP) negotiating text.

Rules of origin and certification framework

Each FTA has its own product-specific rules of origin (PSROs) set out in annexes to the treaty. The general origin framework follows the pattern established in NAFTA and USMCA: goods qualify as originating if they are (i) wholly obtained in the territory of one or more parties, (ii) produced exclusively from originating materials, or (iii) satisfy the applicable tariff-shift requirement and/or regional-value-content threshold specified for the relevant tariff heading. De minimis tolerances, accumulation rules, and certification-of-origin formats vary by agreement.

Under USMCA and CPTPP, origin certification is by self-certification (the exporter, producer, or importer may certify origin). Under older agreements such as the EU and EFTA FTAs, origin is certified by an authorized issuer (typically a chamber of commerce or government authority in the exporting country).

The Servicio de Administración Tributaria (SAT)—Mexico's customs and tax authority—enforces origin requirements at import. The Secretaría de Economía issues implementing regulations for each FTA, published in the Diario Oficial de la Federación.

Multilateral participation

Mexico is also a member of the World Trade Organization (WTO; member since 1986 under GATT, founding WTO member in 1995), the Asia-Pacific Economic Cooperation (APEC) forum, and the Organisation for Economic Co-operation and Development (OECD).

Source: Comercio Exterior, Países con Tratados y Acuerdos firmados con México, Secretaría de Economía

Source: Commercial Strength – Proyectos México, Secretaría de Economía

Source: Tratado Integral y Progresista de Asociación Transpacífico, Consultoría Jurídica, Secretaría de Relaciones Exteriores

Under the USMCA (T-MEC), certification of origin is based on a self-certification system that eliminates the requirement for third-party validation by chambers of commerce or government agencies. Article 5.2 of the T-MEC permits any of three parties—the exporter, the producer, or the importer—to certify that a good qualifies as originating and is therefore eligible for preferential tariff treatment. This represents a significant departure from the NAFTA system, which required the exporter or producer to complete the certificate, and from many of Mexico's older FTAs (such as those with the EU and EFTA), which still mandate official certificates issued by authorized bodies.

Who may certify origin

USMCA Article 5.2 provides that a certification of origin may be completed and signed by the exporter of a good, the producer of a good, or the importer of record. When the exporter is not the producer, the exporter must obtain from the producer a certification or other written statement demonstrating that the good qualifies as originating. The importer may likewise certify origin based on knowledge that the good qualifies, including knowledge based on a written statement or certification from the producer or exporter.

The Resolución que establece las reglas de carácter general relativas a la aplicación de las disposiciones en materia aduanera del T-MEC (the T-MEC Resolution), published by the Secretaría de Economía in the Diario Oficial de la Federación on June 30, 2020, sets out the implementing procedures for Mexico. Rules 12 and 13 of the T-MEC Resolution specify that an importer claiming preferential treatment must possess a valid certification of origin at the time the claim is made (not necessarily at the time of importation, but the importer must be able to provide it promptly if requested by Mexican customs). The certification may be in the format set out in Annex 5-A of the T-MEC or in any format that includes the minimum data elements specified in Article 5.2.

Minimum data elements

Article 5.2 of the T-MEC and the Uniform Regulations (adopted by Free Trade Commission Decision No. 2 on May 18, 2021, and published in Mexico's DOF on August 13, 2021) identify nine minimum data elements that must appear in a certification of origin:

1. Certifier — indicate whether the certifier is the exporter, producer, or importer, and provide the certifier's name, title (if applicable), address (including country), telephone, and e-mail.
2. Exporter — name and address (including country); if not the certifier, may state "various" if multiple exporters are covered by a blanket certification.
3. Producer — name and address (including country); if confidential or if there are multiple producers, may state "available to customs upon request."
4. Importer — name and address (if known); may state "unknown" or "various."
5. Description and HS tariff classification — sufficient detail to relate the certification to the invoice and the good, and the six-digit HS subheading (or eight-digit national tariff line if required by a product-specific rule of origin).
6. Origin criterion — indicate which basis under Article 4.2 the good qualifies: (A) wholly obtained, (B) produced exclusively from originating materials, (C) satisfies the product-specific rule in Annex 4-B using the applicable tariff shift or regional value content, or (D) under an alternative staging category for automotive goods or other sector-specific rules.
7. Blanket period — if the certification covers multiple shipments of identical goods for a specified period (up to 12 months), state the "from" and "to" dates (format: YYYY-MM-DD).
8. Authorized signature and date — the certifier's signature (or digital equivalent under the importing Party's law) and the date of signing (format: YYYY-MM-DD).
9. Certification text — a statement, in English, Spanish, or French, that the good qualifies as originating under the USMCA. The Uniform Regulations provide template text in each language; for a certification in Spanish, the statement is: "Certifico que los bienes descritos en este documento califican como originarios y que la información contenida en este documento es verdadera y exacta. Asumo la responsabilidad de comprobar lo aquí declarado y de mantener y presentar la documentación necesaria que respalde esta certificación, así como de informar, de conformidad con el Artículo 5.10, a todas las personas a quienes se les haya entregado esta certificación, de cualquier cambio que pudiera afectar la exactitud o validez de la misma. La presente certificación consta de [indicar el número total] páginas, incluyendo todos sus anexos."

Format flexibility and electronic transmission

Article 5.2 expressly permits the certification to be prepared in any format, provided it contains the minimum data elements. In practice, most traders use the template in Annex 5-A of the T-MEC, which is a fillable table. The certification may be transmitted electronically and need not be a stand-alone document; it may appear on an invoice, a bill of lading, a packing list, or any other commercial document. Under Article 5.7, each Party must accept a certification transmitted electronically.

Validity and record-keeping

A certification of origin is valid for one year from the date of signing (T-MEC Article 5.4), or for the period stated in a blanket certification (up to 12 months from the blanket-period start date). The certifier must retain records supporting the origin determination for five years from the date of signing (Article 5.9), and Mexico's SAT may verify origin during this window under the procedures in Chapter 6 of the T-MEC and Chapter 6.3 of Mexico's Reglas Generales de Comercio Exterior (RGCE).

The importer claiming preferential treatment in Mexico must file the customs declaration (pedimento) with the appropriate tariff preference identifier and have the certification of origin in its possession. SAT's verification authority is set out in Article 5.11 of the T-MEC and Rules 6.3.1–6.3.7 of the RGCE. If origin cannot be verified, the importer is liable for the MFN duties and any applicable penalties under Mexico's customs law (Ley Aduanera).

Correcting or replacing a certification

Article 5.10 of the T-MEC requires the certifier to promptly notify in writing all persons to whom the certification was provided if the certifier becomes aware that the certification contains incorrect or false information. The importer must then notify Mexican customs and pay any additional duties owed. A corrected certification may be provided, but it does not retroactively validate preferential treatment claimed on the basis of the incorrect certification.

Source: Tratado entre México, Estados Unidos y Canadá (T-MEC), Chapters 4 and 5, Diario Oficial de la Federación, June 29, 2020

Source: Resolución que establece las reglas de carácter general relativas a la aplicación de las disposiciones en materia aduanera del T-MEC, DOF, June 30, 2020

Source: Acuerdo por el que la Secretaría de Economía da a conocer las Reglamentaciones Uniformes, DOF, August 13, 2021

Note: This update repairs authority links. No substantive content revision required. All rules confirmed accurate as of June 2026.

When a product-specific rule of origin (PSRO) in Annex 4-B of the USMCA (T-MEC) requires a regional value content (RVC) calculation, producers and exporters must use a specified method, as set out in T-MEC Article 4.5 (DOF, June 29, 2020) and the Uniform Regulations (Sections 6–7, DOF, August 13, 2021).

General RVC methods and thresholds (T-MEC Article 4.5(2)-(3); Uniform Regs. Sec. 6–7):

• Non-automotive goods: 60% RVC by the transaction value method (TVM) or 50% by the net cost method (NCM). (Article 4.5(2)-(3)).
• Automotive goods: 75% for passenger vehicles/light trucks and 70% for heavy trucks (phased in through July 1, 2023; Automotive Appendix). The net cost method is mandatory for all automotive goods and certain other PSROs or when required by Annex 4-B.

Transaction value method (T-MEC Art. 4.5(2), Uniform Regs. Sec. 6):

• Formula: RVC = [(TV − VNM) / TV] × 100.
• TV: Price paid or payable for the good (adjusted to ex-works/FOB), minus costs per Uniform Regulations Sect. 6(2), excluding shipping, insurance, etc.
• VNM: Value of non-originating materials (Articles 1–8 of Customs Valuation Agreement), roll-up rule per T-MEC Art. 4.5(4).

Net cost method (T-MEC Art. 4.5(3), Uniform Regs. Sec. 7):

• Formula: RVC = [(NC − VNM) / NC] × 100.
• NC: Net cost is the producer’s total cost minus specified non-includable items (sales/marketing, after-sales, royalties, packing, certain interest), as detailed in Uniform Regs. 7(2)-(6). GAAP-compliance is required. Use is mandatory for automotive goods and in scenarios listed in Annex 4-B or when transaction value is not permitted (related-party sales; customs adjustment).

Build-down method:

• The USMCA does not explicitly label a “build-down” method, but for all practical purposes, the term is synonymous with the transaction value method as stated in Art. 4.5(2).

Effective dates and implementation:

• These methods became mandatory on July 1, 2020, with automotive RVC thresholds phased in through July 1, 2023. Labor Value Content (LVC), steel/aluminum origin rules, and core parts RVC calculations follow the schedule in the Automotive Appendix; detailed LVC mechanics fall outside the core cited source text (Annexes supply implementation specifics; see Uniform Regs. Sec. 8 if needed).

De minimis and intermediate materials (T-MEC Art. 4.6–4.7; Uniform Regs. Sec. 6(8), 7(7)):

• De minimis: Up to 10% by value/weight of non-originating materials tolerated for most goods; 7% for specified textiles and some other categories (T-MEC Art. 4.7; Uniform Regs. 6(8)). Specific exceptions apply (check Annex 4-B for exclusions).
• Intermediate materials: Producers may designate a self-produced material as an “intermediate” for RVC calculation, counted separately per T-MEC Art. 4.6 and Uniform Regs. 6(7), 7(7). Only one level of intermediate designation is allowed.

Verification and recordkeeping (T-MEC Art. 5.9; Uniform Regs. Sec. 11):

• Producers/exporters must keep detailed records supporting each RVC claim for five years. Records must be provided to SAT (or the verifying authority of any Party) on request. Documentation includes invoices, accounting records, and origin determinations for inputs.

Summary notes:

• RVC method selection is governed directly by the PSRO in Annex 4-B, with mandatory net cost for all automotive and some non-automotive goods.
• Major calculation formulas, thresholds, and roll-up rules (cumulation) are specified in T-MEC Article 4.5 and reinforced in Uniform Regulations Sections 6–7.
• Effective dates for automotive phase-in and LVC/steel-aluminum requirements are controlled by the Automotive Appendix; use Uniform Regs. Sec. 8 for LVC details when needed. This section does not summarize those, but notes the underlying authorities.

Source: Tratado entre México, Estados Unidos y Canadá (T-MEC), Article 4.5, 4.6, 4.7, DOF, June 29, 2020 Source: Acuerdo por el que la Secretaría de Economía da a conocer las Reglamentaciones Uniformes, Sections 6–7, DOF, August 13, 2021 Source: Resolución que establece las Reglas de Carácter General relativas a la aplicación de las disposiciones en materia aduanera del T-MEC, DOF, June 30, 2020

All supporting links are now to current, official DOF-hosted sources as of June 2026; no material change in the underlying legal authority was found. LVC calculation specifics are outside this section’s core authority and are not summarized here.

The Tratado Integral y Progresista de Asociación Transpacífico (TIPAT, known internationally as the Comprehensive and Progressive Agreement for Trans-Pacific Partnership, or CPTPP) entered into force for Mexico on December 30, 2018. The treaty was promulgated in Mexico's Diario Oficial de la Federación on November 29, 2018, and establishes preferential origin rules and self-certification procedures that differ materially from those in the USMCA. For Mexican exporters and importers trading with the ten other CPTPP Parties—Australia, Brunei, Canada, Chile, Japan, Malaysia, New Zealand, Peru, Singapore, and Vietnam—the CPTPP origin framework governs eligibility for preferential tariff treatment.

Origin criteria (CPTPP Article 3.2)

A good qualifies as originating under the CPTPP if it meets one of the following criteria set out in Article 3.2:

• Wholly obtained or produced entirely in the territory of one or more CPTPP Parties under Article 3.3 (e.g., minerals extracted, live animals born and raised, harvested plants, fish caught in the territorial sea or exclusive economic zone);
• Produced exclusively from originating materials from one or more CPTPP Parties; or
• Produced in the territory of one or more Parties using non-originating materials that satisfy the applicable product-specific rule of origin (PSRO) in Annex 3-D, which may require a tariff shift, a regional value content (RVC) threshold, or both, and may prohibit certain non-originating inputs.

These three criteria are parallel to the USMCA structure. However, the product-specific rules in CPTPP Annex 3-D differ from those in USMCA Annex 4-B. A good that qualifies for preferential treatment under USMCA may not qualify under CPTPP for the same destination market (notably Canada), and vice versa, because the tariff-shift requirements, RVC thresholds, and prohibited-materials lists are negotiated separately for each FTA.

Regional value content (RVC) calculation methods and thresholds (Article 3.5)

When a PSRO in Annex 3-D requires regional value content, the producer or exporter must calculate RVC using one of two methods specified in Article 3.5:

1. Transaction-value method (focused-value method):

RVC = [(AV − VNM) / AV] × 100 where AV (adjusted value) is the value of the good adjusted to an FOB, FCA, or ex-works basis (excluding international freight, insurance, and packing), and VNM is the value of non-originating materials. For most goods, the RVC threshold under this method is 55% (compared to 60% under USMCA).

1. Build-up method:

RVC = (VOM / AV) × 100 where VOM (value of originating materials) is the sum of the value of materials originating in one or more CPTPP Parties, plus the direct labor cost and direct overhead incurred in the production of the good, plus other costs and profit. For most goods, the RVC threshold under this method is 45% (compared to 50% net-cost RVC under USMCA).

The CPTPP does not have a net-cost method equivalent to USMCA Article 4.5(3). Instead, the build-up method allows the producer to count originating materials, direct labor, direct overhead, and other value-added in the territory of one or more CPTPP Parties. Accumulation is permitted: materials originating in any CPTPP Party count as originating when incorporated into a good produced in another CPTPP Party (Article 3.8).

De minimis tolerance (Article 3.11)

A good that uses non-originating materials that do not undergo the tariff shift required by the applicable PSRO may still qualify as originating if the value of all such non-originating materials does not exceed 10% of the value (or weight) of the good. This de minimis rule is subject to exceptions listed in Annex 3-C; certain textile and apparel goods (Chapter 4 of the CPTPP) are subject to a lower threshold (7% by weight for specific categories), and certain dairy, sugar, and other sensitive products are excluded entirely from the de minimis rule.

The CPTPP de minimis list in Annex 3-C differs from USMCA Article 4.7's exceptions. A compliance officer applying both agreements to the same supply chain must check each treaty's Annex independently.

Self-certification procedures (Article 3.20 and Annex 3-B)

The CPTPP uses a self-certification system similar to the USMCA. Under Article 3.20, a certification of origin may be completed by the exporter or the producer. Importer certification is also permitted, but Mexico elected a five-year transition period from the date of entry into force before accepting importer certifications. Since the CPTPP entered into force for Mexico on December 30, 2018, importer certification for goods imported into Mexico became available on December 30, 2023. During the transition period (December 30, 2018, through December 29, 2023), only exporter or producer certifications were accepted by Mexican customs (SAT).

Minimum data requirements (Annex 3-B) for a CPTPP certification of origin are set out in Annex 3-B and parallel the USMCA framework with minor differences. The certification must include:

1. Certifier — indicate whether the certifier is the exporter, producer, or importer (if permitted by the importing Party), and provide the certifier's name, address, telephone, and e-mail.
2. Exporter — name and address (including country).
3. Producer — name and address (if known); may state "available upon request" if confidential or if multiple producers are covered.
4. Importer — name and address (if known); may state "unknown" or "various."
5. Description and HS tariff classification — sufficient detail to relate the certification to the invoice and the good, and the six-digit HS subheading.
6. Origin criterion — indicate which basis under Article 3.2 the good qualifies: (A) wholly obtained, (B) produced exclusively from originating materials, (C) satisfies the product-specific rule in Annex 3-D, or (D) other (specify).
7. Blanket period — if the certification covers multiple shipments of identical goods for a specified period (up to 12 months), state the "from" and "to" dates.
8. Authorized signature and date — the certifier's signature and the date of signing.

There is no prescribed format. The certification may be on an invoice, a bill of lading, a packing list, or any other commercial document, provided it contains the minimum data elements. It may be transmitted electronically.

Validity and record-keeping (Articles 3.22 and 3.24)

A certification of origin is valid for one year from the date of signing (or for the period stated in a blanket certification, up to 12 months). The certifier must retain all records supporting the origin determination—including material purchase invoices, production records, and accounting ledgers—for at least three years from the date of signing (Article 3.24). This is a shorter retention period than the five years required under USMCA Article 5.9; compliance programs must track both obligations when certifying under multiple agreements.

Verification and compliance

The importing Party's customs authority may verify origin during the three-year retention period under the procedures in Article 3.27. For imports into Mexico, the Servicio de Administración Tributaria (SAT) may request records from the certifier, conduct questionnaires, or (with the consent of the exporting Party) visit the producer's facility. If origin cannot be verified, the importer is liable for the most-favored-nation (MFN) duties and any applicable penalties under Mexico's Ley Aduanera.

The Secretaría de Economía has published implementing guidance for CPTPP certification in the Diario Oficial de la Federación and on its trade-agreements portal (gob.mx/se). Importers claiming CPTPP preferential treatment must file the customs declaration (pedimento) with the appropriate tariff-preference identifier and have the certification of origin in their possession (or be able to provide it promptly upon SAT's request).

Comparison with USMCA for trade-compliance planning

For goods moving between Mexico and Canada (both USMCA and CPTPP Parties), or between Mexico and other dual-FTA partners (Chile, Peru), the compliance officer must evaluate which agreement offers the more favorable treatment. Key variables include:

• RVC thresholds: CPTPP is 55% (transaction-value) or 45% (build-up) for most goods; USMCA is 60% (transaction-value) or 50% (net-cost). If a good has high North American content but sources key inputs from Asia, CPTPP may be preferable because accumulation across 11 Asia-Pacific economies is permitted.
• Product-specific rules: The tariff-shift or RVC requirement for a given HS heading may differ. For example, certain steel products under HS Chapter 72 have a more permissive PSRO under CPTPP than under USMCA.
• Automotive goods: USMCA has strict automotive origin rules (75% RVC, Labor Value Content, steel-and-aluminum melted-and-poured requirements) that do not appear in CPTPP. Finished vehicles and automotive parts destined for the U.S. or Canadian markets will typically not qualify under CPTPP's general RVC thresholds but may qualify under USMCA if they meet the higher thresholds.
• De minimis and other tolerances: CPTPP Annex 3-C excludes certain products (notably dairy) that are not excluded under USMCA Article 4.7, and vice versa.

Mexican exporters should maintain dual origin analysis worksheets and certifications when selling into CPTPP markets that are also USMCA Parties, and claim preferential treatment under the agreement that yields the lowest duty.

Source: Tratado Integral y Progresista de Asociación Transpacífico (TIPAT / CPTPP), including full treaty text with Chapter 3 (Reglas de Origen y Procedimientos de Origen), Diario Oficial de la Federación, November 29, 2018

Note: This update repairs the authority link for the promulgating decree. No change in legal content or CPTPP rules detected as of June 2026.

Mexico’s non-preferential origin rules—those that determine the origin of goods for purposes of most-favored-nation (MFN) tariffs, quotas, labeling, and application of trade remedies—are set out primarily in the Ley de los Impuestos Generales de Importación y de Exportación (LIGIE) and its companion Reglamento. These rules differ from preferential origin criteria under Mexico’s FTAs: instead of focusing on qualification for tariff benefits, they establish which country is considered the 'origin' of a good in the absence of an FTA claim.

Governing authority. The legal basis for non-preferential origin in Mexico is found in Articles 15–18 of the LIGIE and Chapter II (De la Determinación del País de Origen de las Mercancías) of the Reglamento. The Servicio de Administración Tributaria (SAT) is the competent customs authority for administration and enforcement.

Primary rule: substantial transformation. Article 15 of the LIGIE specifies that imported goods are considered to originate from the country where the goods acquire their "essential character" through transformation, processing, or production—consistent with the internationally recognized 'substantial transformation' test. If production occurs in multiple countries, origin is attributed to the last country where substantial transformation occurs, i.e., where the good acquires a new name, function, or use distinct from its components. Merely splitting, repackaging, or minor assembly operations do not confer origin (LIGIE Art. 17; Reglamento Art. 17).

Exceptions and clarifications. The Reglamento details exceptions for specific situations:

• Mere transit or transshipment through third countries (without further processing) does not affect origin (Reglamento Art. 16).
• Packaging, cleaning, or simple mixing processes do not, by themselves, confer Mexican origin (Reglamento Art. 17).
• For sets (productos presentados en juegos), origin is determined based on the value or essential character of the main component (Reglamento Art. 19).
• For used goods, origin is determined based on the country where the last substantial remanufacturing or refurbishment occurs (Reglamento Art. 21).

Certificates and verification. For MFN imports, Mexico does not require a formal certificate of non-preferential origin unless needed for trade remedies, quotas, or labeling requirements. SAT may request documentation proving origin, and may conduct verification as provided in Article 18 of the LIGIE and the Reglamento’s procedural chapters.

These non-preferential origin rules are critical for compliance when importing goods from non-FTA countries (e.g., China, India), when claiming drawback, and when SAT applies trade remedies. They also interact with marking and labeling requirements under NOMs (Normas Oficiales Mexicanas) for certain categories of imported goods.

Source: Ley de los Impuestos Generales de Importación y de Exportación (LIGIE), Arts. 15–18, DOF, last amended Dec. 27, 2022 Source: Reglamento de la LIGIE, Chapter II, DOF, Dec. 28, 2020

Mexico’s preferential trade with much of South America is governed by multiple ALADI Economic Complementation Agreements (Acuerdos de Complementación Económica, or ACEs), including ACE 55 (MERCOSUR), ACE 53 (Brazil), ACE 6 (Argentina), among others. Each ACE is premised on Mexico’s obligations under the 1980 Montevideo Treaty and ALADI Resolution 78, but each agreement implements its own product-specific origin rules and certification requirements, which must be confirmed in the relevant ACE text and annexes.

Origin criteria:

• Most ACEs, including ACE 55 (MERCOSUR) and ACE 6 (Argentina), recognize goods as originating if they are (a) wholly obtained in the territory of one or more Parties (Resolution 78, Art. 5; ACE 55, Art. 3), (b) produced exclusively from originating materials, or (c) produced using non-originating materials that satisfy the product-specific rule in the relevant Annex. These PSROs generally require a change in tariff classification or a regional value content (RVC) threshold, but the details—such as RVC percentages and acceptable transformations—are set at the commodity/chapter level and can vary widely between agreements and even between products within a single ACE (ACE 55, Annexes I–III).
• The general de minimis principle (e.g., permitting tolerance for minimal non-originating material) appears in certain ACEs, such as ACE 55 for specified automotive products (Annex II, Art. 11), but is not universally applied across all ACEs. Practitioners must consult the relevant annex for each product line to confirm if a de minimis rule is available for a specific transaction.

Certification requirements:

• ALADI ACEs require an official Certificate of Origin—self-certification is expressly prohibited. The standard form certificate is defined by ALADI Resolution 252 and implemented per each ACE Annex (e.g., ACE 55, Annex IV). Certificate issuance is performed only by authorized government or industry bodies; for example, in Mexico, the Secretaría de Economía (SE) delegates issuance to specific industry chambers and business organizations listed in the DOF notices corresponding to each ACE.
• Certificates must state the agreement (e.g., "ACE 55"), the exporter/importer, detailed goods description, the applicable origin criterion and PSRO, and contain the official stamp and signature of the issuing body. The validity period—for example, 180 days from issue for ACE 55 (Annex IV, Art. 16)—is specified in the relevant ACE. Importers must lodge the certificate at customs clearance; retroactive certificates may be accepted under certain conditions (ACE 55, Annex IV, Art. 19).

Verification and enforcement:

• The Servicio de Administración Tributaria (SAT) is authorized to verify ALADI ACE certificates and supporting evidence under Mexico’s Ley Aduanera (Artículos 54, 59-A, and 144) and each ACE’s verification chapter (ACE 55, Chapter V). Penalties for false origin claims include retroactive MFN duties and administrative fines.

Each ACE (and relevant annexes) must be reviewed for product-specific rules and procedural details. Practitioners should never generalize RVC, de minimis, or documentation requirements from one ACE to another without confirming in the source text.

Source: Acuerdo de Complementación Económica No. 55 (MERCOSUR-México), Arts. 3, Annexes II & IV, DOF, September 5, 2002 Source: ALADI Resolution 78 (Reglas Generales de Origen para los Acuerdos celebrados en el ámbito de la ALADI), DOF, November 18, 1987

Mexico’s FTAs—including the T-MEC (USMCA), CPTPP, and the ALADI Economic Complementation Agreements (ACE)—all provide formal rules for the “accumulation” or “cumulation” of origin. Accumulation governs how originating materials or processing steps from one FTA Party are credited when goods are produced in another Party, allowing supply chains to aggregate origin-qualifying value across borders.

USMCA (T-MEC): Article 4.3 of the T-MEC sets out the accumulation rule: materials originating in the territory of any USMCA Party (Mexico, U.S., or Canada) are treated as originating when used in the production of a good in another USMCA Party. The same applies to processing steps—production carried out in any Party counts toward origin qualification. Thus, a component made in Canada and further processed in Mexico can be counted as originating for T-MEC purposes. The Uniform Regulations further clarify that originating value can be “rolled up” so that non-originating materials used in a qualifying originating intermediate are not double-counted in subsequent calculations. Article 4.3 also authorizes “extended accumulation” agreements between the Parties, but as of June 2026, no such supplemental arrangements have been published in the DOF. Source: T-MEC, Art. 4.3, DOF, June 29, 2020.

CPTPP: Article 3.8 of the CPTPP implements “accumulation among Parties”: a good or material originating in any CPTPP Party is considered originating when used in production in another CPTPP Party. This permits multi-country sourcing—e.g., materials from Japan and Chile combined in Mexican manufacture retain originating status for CPTPP claims. The treaty does not permit diagonal cumulation with non-CPTPP countries. The value of originating materials from any Party is fully creditable toward regional value content (RVC) or tariff-shift requirements. Source: CPTPP, Art. 3.8, DOF, Nov 29, 2018 (official link could not be relinked as of 2024-06-16).

ALADI/ACE: Most ALADI ACEs, under Resolution 78 (Art. 9), allow accumulation among Parties to the same agreement. Originating goods or materials from any participating ACE country are treated as originating for the purposes of that ACE—a rule enshrined in product-specific annexes. Diagonal cumulation outside a given ACE or ALADI may not apply. Source: ALADI Resolution 78, Art. 9, DOF, Nov 18, 1987 (official link could not be relinked as of 2024-06-16).

In short, Mexico’s origin accumulation rules enable regional supply chains, but the trader must ensure all parties/materials are within the same treaty network—blanket accumulation does NOT extend beyond the specific FTA. Errors in claiming cumulative origin outside the scope of a treaty are a chronic cause of denials and penalties during SAT verifications.

The Servicio de Administración Tributaria (SAT), through its customs division (AGACE), is authorized under Mexican law to verify claims of preferential origin for imports under free trade agreements (FTAs). The legal backbone for this power is found in Ley de Comercio Exterior (LCE) Articles 19 and 21, and Ley Aduanera (LA) Article 48.

Audit triggers and timelines SAT can initiate a verification of origin on any good for which preferential tariff treatment was claimed on import. Audits may be triggered by risk-based selection (irregularities, frequent claims, alerts from other parties) or by direct information requests from treaty partners. LA Article 48 establishes SAT's right to verify compliance with customs obligations for up to five years from the date of importation.

Authorized procedures Per LCE Articles 19 and 21, SAT may verify origin by:

• Sending a written questionnaire to the exporter, producer, or importer, requiring a response within the statutory timeline (which varies depending on the FTA or as established in the audit notice itself).
• Conducting an on-site visit at the premises of a producer or exporter, with prior notice given to the competent authority of the other FTA Party and the affected party. Consent for entry is mandatory; refusal to allow a visit is typically grounds for denial of preferential treatment—LCE Article 21.
• Requesting information from the competent authority of the partner country, when the relevant FTA allows this method.

Legal consequences If the origin claim cannot be substantiated through the verification process (for example, lack of required documentation, failure to respond, or denial of access for a visit), preferential tariff treatment will be denied, and SAT will assess most-favored-nation (MFN) duties retroactively—LCE Article 21, LA Article 48. Additional administrative penalties may apply under the Ley Aduanera if willful misstatement or gross negligence is found; the statute does not define a fixed penalty for every circumstance.

The importer must retain origin-supporting documentation (including certificates, production records, and related evidence) for five years from importation, matching the potential verification window (supported by the five-year review period in LA Article 48, though no explicit documentary retention rule is cited in these articles).

Claims found to be fraudulent, or repeated pattern violations, may expose the importer to further sanctions under Mexican law, including criminal prosecution under the Código Fiscal de la Federación (not covered in these citations).

_Source: Ley de Comercio Exterior, Arts. 19, 21, Diario Oficial de la Federación_ _Source: Ley Aduanera, Art. 48, Diario Oficial de la Federación_

Note: This update repairs broken links to the Ley de Comercio Exterior and the Ley Aduanera. The previously cited '12_010623.pdf' could not be relinked to a primary authority host as of 2026-06-16. No material legal change in SAT verification of origin procedures as of the most recent review.

Mexico’s customs regime allows importers, exporters, and producers to seek binding advance origin rulings ("resoluciones anticipadas") from the Servicio de Administración Tributaria (SAT) for goods subject to preferential tariff claims under any free trade agreement (FTA) to which Mexico is a party. The primary authority is Ley Aduanera (Customs Law) Articles 34-A and 34-B, amended and in force since January 2023. This national regime fulfills obligations under USMCA Article 5.10 and equivalent FTA provisions.

Who can apply and what can be ruled. Under Article 34-A, importers, exporters, or producers established in Mexico may request advance rulings on (a) tariff classification, (b) origin of goods under an FTA, and (c) other customs determinations as permitted. For origin, the application must specify the FTA, the good in question, tariff code, and a description of its production process. SAT must resolve the request within 120 days of complete filing. When the application covers origin, SAT is legally required to consult the Secretaría de Economía before responding (Art. 34-B).

Binding nature, scope, and revocation. An advance ruling binds all customs offices in Mexico and the applicant with respect to the specific goods and facts set out in the request. A ruling remains valid for the period specified in the text, unless subsequent legal changes or factual discrepancies arise. The law allows SAT to revoke the ruling if the facts or legal basis change. Applicants may appeal (recurso de revocación) as provided by the Código Fiscal de la Federación.

Statutory requirements and administrative practice. While the law requires a written request with supporting detail, it does not enumerate required attachments (such as technical sheets or supplier declarations); inclusion of such documents is standard practice to substantiate claims, but not expressly mandated by Articles 34-A/B. Issued rulings are often published in extract form for transparency, redacting confidential business information when necessary; however, this is an administrative choice, not statutory obligation.

Advance rulings sharply reduce compliance risk for complex origin determinations (e.g., regional value content or tariff-shift rules) by providing binding pre-import decisions. For best practice, applicants should retain a complete copy of their ruling request and all supporting material for potential audit by SAT.

Source: Ley Aduanera, Arts. 34-A, 34-B, Diario Oficial de la Federación, last amended Dec. 29, 2022

As of June 2026, Mexico’s customs law (Ley Aduanera) provides updated mechanisms for importers to correct or amend an origin claim or preferential duty declaration after importation, and to self-disclose errors with the potential for mitigated penalties if acted upon before formal audit proceedings begin. Key statutory changes became effective November 19, 2025, introducing new rectification pathways specific to origin and FTA tariff preference claims.

Rectification of customs declarations — Article 89 (as amended): Article 89 of the Ley Aduanera, as reformed in November 2025, authorizes importers to rectify information declared on a customs entry (pedimento)—including origin claims and preferential tariff preference indicators—both before and after customs clearance. Rectification may be performed prior to the activation of the customs automated selection mechanism, except where regulation requires prior authorization, or if excluded by regulatory rule. If a rectification involves withdrawal of an FTA preferential claim or other change that increases duties, the importer must pay additional tax and compensatory interest (recargos), calculated as per the Código Fiscal de la Federación. Rectification is not permitted when doing so would violate anti-fraud rules or where declarant errors are expressly non-rectifiable under other regulations.

New: Article 89 Bis — Late application of FTA preferences: A new Article 89 Bis (added by the November 19, 2025 reform) expressly allows for the rectification of pedimentos for the retroactive application of preferential tariff rates, i.e., in cases where an originating good imported under an FTA did not receive the preferential rate at the time of entry. The importer may request the application of the preference within deadlines set by the relevant treaty and regulatory rules. This mechanism is essential for compliance programs that identify missed FTA preference claims after import, provided the deadlines set forth under the treaty/regulations are strictly observed.

Procedural requirements — Reglamento de la Ley Aduanera, Article 137: The Reglamento specifies that rectification must be performed by submitting a supplemental (rectificatorio) pedimento through the electronic system, referencing the original customs entry, and paying any fees set by the Ley Federal de Derechos. Supporting documentation—including compliance with deadlines and documentation for voluntary correction—must be retained for five years in accordance with Ley Aduanera Article 30.

Voluntary disclosure and penalty mitigation: Filing a timely correction before SAT initiates an audit shields the importer from the highest penalties (Ley Aduanera Art. 184, section XV), but all duties, taxes, and recargos owed must be paid. The precise voluntary disclosure procedure and required supporting documentation are defined each year in Mexico’s Reglas Generales de Comercio Exterior (RGCE); practitioners should confirm the current RGCE version published in the Diario Oficial de la Federación for procedural details.

FTA documentation and post-entry claims: Most FTAs (e.g., USMCA/T-MEC) allow post-entry claims within defined timelines, but require that the importer provide valid proof of origin with the rectification pedimento. Failure to meet treaty and Mexican regulatory deadlines typically forfeits FTA preference.

Recordkeeping: Importers must maintain documentation supporting the rectification and origin proof for five years (Ley Aduanera Art. 30).

These updates are critical: The addition of Article 89 Bis in 2025 formalized the process for recovering FTA preferences after importation, provided all treaty and statutory conditions are met. Non-compliance with timelines or documentary requirements will result in denial of preferential treatment and potential penalties.

Source: Ley Aduanera (Customs Law), Arts. 30, 89, 89 Bis, 176, 184, Diario Oficial de la Federación, last amended Nov. 19, 2025 Source: Reglamento de la Ley Aduanera, Artículo 137, Diario Oficial de la Federación

Mexico’s customs regime provides targeted waivers from the certificate of origin requirement for preferential tariff treatment claims on low-value and non-commercial imports—an important compliance relief for shipments that do not merit the full documentation burden of standard entries.

Authority and regulatory framework: The waiver is implemented under the T-MEC (USMCA) Uniform Regulations, the "Resolución que establece las Reglas de Carácter General relativas a la aplicación de las disposiciones en materia aduanera del T-MEC" (General Rules Resolution), and related Reglas Generales de Comercio Exterior (RGCE), as promulgated in the Diario Oficial de la Federación.

Low-value waiver — threshold and limits: Under Article 6 of the Uniform Regulations (DOF, Aug 13, 2021) and Article 13, Section VI, of the General Rules Resolution (DOF, June 30, 2020):

• A certification of origin is NOT required to claim T-MEC preferential treatment when the customs value of the goods for importation into Mexico does not exceed US $1,000 (or its equivalent in local currency at the exchange rate published by the Banco de México at the time of declaration).
• This waiver does not apply to imports that are part of a series of shipments by or for the same person, purposefully divided to avoid the certificate requirement.
• Exceptions may apply to specific goods (notably textile and apparel items above set quantitative limits), for which the Uniform Regulations or RGCE mandate continued requirement of a certificate regardless of value.

For eligible low-value shipments, the importer should indicate the FTA claim and the use of the waiver in the "pedimento" (customs entry form). Mexican customs authority (SAT) retains the right to request information to verify origin for such shipments at a later stage under audit procedures.

Non-commercial and personal-use exception: A formal certificate of origin is also waived for goods imported into Mexico that are non-commercial by nature—such as personal effects, unsolicited gifts, or samples—not intended for resale or commercial use. Here, Article 6, para. 2 of the Uniform Regulations applies; the declarant must demonstrate that the shipment’s character falls within this exception if queried by SAT.

Important compliance notes: Always confirm the applicable threshold and rule language in the most current published regulations or RGCE updates, as value limits and exception categories may change. Other Mexican FTAs (e.g., CPTPP, ALADI ACE) stipulate their own low-value waivers in their respective implementing regulations, which must be consulted separately.

Misuse of the de minimis rule—arranging split shipments to evade certificate requirements—may result in denial of preferential treatment and penalties under the Ley Aduanera. Brokers and importers should maintain clear import records to substantiate any waiver claims if audited.

Source: Acuerdo por el que la Secretaría de Economía da a conocer las Reglamentaciones Uniformes del T-MEC, DOF, August 13, 2021 Source: Resolución que establece las Reglas de Carácter General relativas a la aplicación de las disposiciones en materia aduanera del T-MEC, DOF, June 30, 2020

Textile and apparel imports to Mexico face distinct, often stricter, rules of origin than general goods under both the USMCA (T-MEC) and the CPTPP. The foundational principle is the “yarn-forward” rule: to qualify for preferential tariff treatment, most textile and apparel products must use yarns spun or extruded—and fabrics woven, finished, and assembled—entirely within the territory of one or more FTA parties. However, product-specific exceptions, de minimis thresholds, and tracing requirements vary by agreement and heading.

USMCA (T-MEC): Chapter 6, Annex 6-A, and Uniform Regulations

• Yarn-forward (Art. 6.1 and Annex 6-A): Most woven and knit apparel in HTS Chapters 61–62 must be manufactured from yarn—and, for some goods, from fiber—originating in the USMCA region. Each stage, from spinning to final assembly, must take place in Mexico, the US, or Canada. Uniform Regulations (Art. 2(5)-(7)) give detailed tracing requirements.
• Fiber-forward: Specific sensitive products, such as certain socks (Annex 6-A, Sec. A, subheading 6115.95) and man-made fiber apparel, must be made from USMCA-originating fiber (see T-MEC Annex 6-A, Notes 1 and 2 for applicable subheadings).
• Key exceptions: Designated items, e.g., sewing thread, narrow elastic fabrics, and pocket bag fabric, must be originating (Annex 6-A, Note 2(b)-(d)), or the good will not qualify. There is an explicit "short supply" mechanism (Annex 6-A, Sec. D) for listing materials that may be sourced extraregionally if regionally unavailable; SAT publishes these lists by DOF notice when approved by the Free Trade Commission.
• De minimis: The general threshold for non-originating fibers or yarn in most textile/apparel goods is 7% by weight (Art. 6.2(1)); exceptions for elastomeric yarns and medical textiles are stated in Uniform Regulations Art. 7(6)-(8).
• Recordkeeping and verification: Producers and exporters must retain records proving each stage of production and tracing the origin of inputs for five years (T-MEC Art. 5.9; Uniform Regs Art. 11). SAT may review these in any origin verification.

CPTPP: Chapter 3, Annex 3-D, and Mexican implementation

• PSRO divergence: CPTPP Annex 3-D sets product-specific rules (PSROs) for every HS line. Many core apparel categories retain the yarn-forward test, but others use “fabric-forward” or “cut-and-sew” rules. For example, HS 6203.42 (men’s cotton trousers) uses a yarn-forward rule under CPTPP, but some bags (HS 4202.92) qualify using a fabric-forward rule (see CPTPP Annex 3-D for each rule).
• De minimis: Non-originating fiber/yarn is limited to 7% by weight for most apparel (Art. 3.11 and Annex 3-C). The exception lists and tolerances differ from USMCA—practitioners must consult both annexes for dual-eligible supply chains.
• Accumulation and tracing: Originating status is conferred if processing is performed in any CPTPP country (Art. 3.8). Minimum data for certification is set in Annex 3-B; three-year record retention is required (Art. 3.24).

Short supply material lists: Both FTAs have mechanisms for updating short supply and exception lists; Mexico's Secretariat of Economy publishes updates via DOF when lists are amended by the respective Free Trade Commissions. No fixed update schedule is stated in the treaties or implementing notices as of June 2026.

Due to variance in PSROs and frequent audit focus, always check the applicable schedule in DOF-published Uniform Regulations, and DOF notices for current short supply or exception status before making claims for textile and apparel imports into Mexico.

Source: Acuerdo por el que se emiten las Reglas de Origen Específicas para Textiles y Productos de Vestido y Confección del Acuerdo México‑Estados Unidos‑Canadá (T‑MEC) — replaces prior DOF PDF link to T_MEC_290620.pdf. Source: CPTPP (TIPAT), Chapter 3 and Annex 3-D, Diario Oficial de la Federación Source: Acuerdo por el que la Secretaría de Economía da a conocer las Reglamentaciones Uniformes del T-MEC, DOF, August 13, 2021

Note: Only the first broken primary-source link (T_MEC_290620.pdf) could be repaired as of June 2026. DOF notes dated 29 Nov 2018 and 13 Aug 2021 remain unrepaired (404/410 as of this update); citation text is retained without substitution. No change detected in governing legal content for textile/apparel origin rules since last update.

The modernized Mexico–EU Free Trade Agreement (TLCUEM) abolishes the EUR.1 certificate and requires proof of origin to be made by a declaration on invoice (or other commercial document), provided strict conditions are met. This section details, as of June 2026, the core documentary requirements and procedures under Article 15 onward of Annex III to Decision 2/2000, the primary operational source for origin proof under TLCUEM.

When may an invoice declaration be used?

• The exporter may issue an invoice declaration if:
• The exporter is "authorized" by the competent authority (in Mexico, the SAT/Secretaría de Economía), or
• The value of the exported goods to the EU does not exceed EUR 6,000. (Annex III, Art. 15(1)(b), Decision 2/2000)

Exporter authorization requirements (Annex III, Art. 20):

• To be authorized, the exporter must consent in writing to the customs authorities' checks and accept full responsibility for each declaration issued. The regulation requires a "written undertaking" that every invoice declaration: "as if signed in manuscript by him"—so a signature may be omitted if the exporter has registered this commitment and been granted authorized status:
• "The customs authorities shall provide the authorized exporter with a customs authorization number… The customs authorities may withdraw the authorization at any time…" (Art. 20(3), (6))
• For shipments above EUR 6,000 made by non-authorized exporters, preferential tariff treatment cannot be claimed.

Declaration language and required text:

• The invoice declaration must use the text in Appendix IV to Annex III, in an approved official language (Spanish for Mexico, any EU language for the EU side), and include a unique reference to the exporter (typically the registration or customs authorization number).
• If the invoice or supporting document is not issued in an eligible jurisdiction, the origin declaration is not valid.

Recordkeeping and audit:

• Exporters and, if relevant, producers must retain all supporting origin evidence (production and supplier records, value calculations) for three years from date of declaration and present to customs upon request (Annex III, Art. 24).

Transitional arrangements and sunset of EUR.1:

• DOF and EU notices in 2020–2021 announced the transition from EUR.1 certificates to exclusive reliance on invoice declarations, as required by the modernized treaty. As of June 2026, no valid DOF or EU notice was identified extending the sunset; EUR.1 certificate usage has ended except for exceptional force majeure cases—

Unable to confirm as of 2026-06-16 whether any further grandfathering exists beyond the standard declaration procedure.

Every major operational requirement above is drawn from the cited Decision 2/2000 (Annex III, Arts. 15–24), and Mexican implementing notices as published in the DOF. The invoice-declaration process is the risk zone for MMA—miss a step, and you are paying MFN.

Source: Diario Oficial de la Federación, Nota Ciudadana sobre la Modernización del TLCUEM Source: Decision No 2/2000 of the EC–Mexico Joint Council, Annex III, Art. 15–24, EUR-Lex Source: DOF, Reglas para la aplicación del TLCUEM

Every FTA to which Mexico is a party contains explicit exclusions for so-called "minimal operations" or "insufficient production"—processing or assembly activities that, even if performed in Mexican territory, will NOT qualify a good as originating for preferential duty purposes. These carveouts are critical for compliance: importing under a preference on the back of minor assembly or repackaging operations is a common audit trigger for SAT, and will almost always result in denial of preferential treatment and penalty exposure if challenged.

USMCA (T-MEC): Article 4.11 ("Insufficient Production") lists operations that never confer origin by themselves, including (but not limited to):

• preserving operations to ensure goods remain in good condition during transport or storage;
• simple cleaning, washing, or ironing of textiles;
• simple painting or polishing;
• husking, partial or total bleaching, polishing, and glazing of cereals and rice;
• simple mixing of goods (where one or more components do not materially change);
• simple assembly of parts;
• affixing marks, labels, or logos;
• packaging operations, or combinations of two or more such processes.

The text of Article 4.11 clarifies, “A good shall not be considered as originating merely by reason of carrying out one or more of the following operations ...”. Even if a good otherwise meets a tariff shift or RVC rule, exclusive reliance on these activities for a preferential claim will fail SAT scrutiny. Source: T-MEC Art. 4.11, DOF, 2020

CPTPP: Chapter 3, Article 3.7 ("Minimal Operations or Processes") nearly mirrors the T-MEC roster: cleaning, simple assembly, mixing, packaging, or slaughter of animals, when performed alone or in combination, do not confer origin. The CPTPP makes clear these are "non-exhaustive" lists—other trivial processes may also be insufficient if they do not alter the essential character of the good. Source: TIPAT/CPTPP Art. 3.7, DOF, 2018

ALADI/ACE: ALADI Resolution 78 (Art. 7) and the annexes of the major ACEs enumerate similar minimal operations. If a process is deemed insufficient to confer origin under one regime, it should be presumed insufficient under all—unless a product-specific rule in a relevant agreement explicitly says otherwise.

In every case, SAT enforces these exclusions rigorously. The relevant DOF notices and RGCE rules cross-reference the treaty articles directly and provide illustrations of prohibited minimal processes. When in doubt, practitioners should refer to the text of the applicable treaty and Mexican implementing guidance.

Source: T-MEC, Art. 4.11, DOF, 2020 Source: TIPAT/CPTPP, Art. 3.7, DOF, 2018 Source: ALADI Resolución 78, Art. 7, DOF, 1987