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The Decreto para la Autorización Inmediata de Inversiones, published in Mexico's Diario Oficial de la Federación on 4 May 2026, creates a streamlined investment-authorization mechanism under President Sheinbaum's Plan México strategy. The decree establishes an Investment Committee — composed of the Secretariats of Economía, Hacienda, SEMARNAT, SCT, Energía, and Bienestar — mandated to issue authorization certificates within 30 business days for qualifying projects, replacing the historic 6–18-month multi-agency backlog. Eligibility covers three tiers: projects in designated Polos de Desarrollo Económico para el Bienestar (Welfare Development Poles), investments of MXN 2 billion (≈USD 100M) or more, and projects in strategic sectors (semiconductors, EV batteries, critical minerals, automotive supply chain, medical devices, biotech, aerospace). This is the procedural- acceleration arm of Plan México, structurally distinct from the January 2025 Plan México tax-incentive decree (the fiscal arm), and operationalises the February 2026 Plan México expansion announced by Sheinbaum.

Presidential decree signed by President Claudia Sheinbaum and published in the evening edition of the Diario Oficial de la Federación on 23 April 2026, in force 24 April 2026. The decree amends the Tariff of the Ley de los Impuestos Generales de Importación y de Exportación (LIGIE/TIGIE) and the Decreto que establece diversos Programas de Promoción Sectorial (PROSEC), imposing MFN import duties at 5%, 10%, 15%, 25%, 30% or 35% ad valorem on 185 tariff fractions covering chemical products, cosmetics, paper and cardboard, textiles, steel, graphic arts, aluminum manufactures, auto parts, electrical material, bicycles, musical instruments, furniture, wind turbines, and trailers. Goods originating in countries with which Mexico has a free-trade agreement remain eligible for preferential treatment, so practical incidence falls on China and other non-FTA suppliers (Korea, India, Vietnam, Thailand, Brazil, Indonesia, Taiwan, UAE, South Africa). Paired PROSEC modifications add tariff fractions to Article 5 sections I, II.b and XIX (electrical, electronic, automotive and auto-parts industries) at exempt (EX) rates.

On 24 March 2026 Mexico's Supreme Court (SCJN), sitting in full Pleno session, unanimously upheld the constitutionality of the 2022 lithium nationalisation law (Decreto reforming the Mining Law and creating LitioMx) when resolving Acción de Inconstitucionalidad 78/2022 brought by a Senate minority (33 % of senators). The court affirmed Articles 1, 5 bis, and 10 of the Mining Law — which reserve all lithium exploration, exploitation, processing, and commercialisation exclusively to the State via the LitioMx decentralised public body and prohibit private concessions entirely — are constitutional, provided implementation follows established procedures requiring technical support and Mexican Geological Service validation. The ruling closes the last formal constitutional challenge to Mexico's state-monopoly lithium regime, confirming a permanent exclusion of private capital from the full lithium value chain.

On 5 February 2026, at the National Investment Promotion Meeting, Mexico's two state development banks — Nacional Financiera (Nafin) and Banco Nacional de Comercio Exterior (Bancomext) — announced a scheme to mobilise over MXN 120 billion (~USD 6.9 billion) in financing for micro, small and medium enterprises (MiPyMEs) and strategic Plan México projects. The package channels public resources through credit, guarantees and co-investment mechanisms, including 70% credit guarantees up to MXN 20 million in priority sectors and 80% guarantees on first-time credits up to MXN 5 million, alongside reduced factoring interest rates and an additional MXN 40 billion Bancomext facility for industrial real estate. The scheme operationalises financing for the PODECOBI/PODECIBI economic development poles established under Mexico's 2025 Plan México decree.

On 31 December 2025 the Mexican Presidency published a decree amending the 2023 basic-basket import-tariff exemption, removing at least eight staple-food categories — fresh/refrigerated/frozen beef and pork, milk and cream, dry beans, rice, soybean/sunflower/safflower/cotton oils, tilapia fillets (HS 0304.61.01) and sausages (HS 1601.00.03) — from the duty-free list effective 1 January 2026. The decree frames the move as reinforcing Plan México's food self-sufficiency goals (Plan de Autosuficiencia en Frijol, a 2030 domestic-dairy production target) by disincentivizing imports of products with growing domestic production capacity. Transition relief lets basic-basket importers with contracts signed before 31 December 2025 keep the exemption through 31 March 2026, and other registered importers through 31 March 2027, subject to SAT contract filing deadlines.

Decree reforming various tariff fractions of the General Import and Export Duties Tariff (TIGIE), published in the Diario Oficial de la Federación on 29 December 2025 and in force 1 January 2026. The reform, approved by Congress as a statutory amendment to the LIGIE (Chamber of Deputies and Senate, Dec 2025) and signed by President Claudia Sheinbaum, raises MFN import duties to between 5% and 50% ad valorem on 1,463 tariff lines covering more than 20 chapters of the TIGIE, spanning automotive, auto parts, textiles, apparel, footwear, steel, aluminum, plastics, paper, leather, furniture, glass, toys, appliances and cosmetics. The increases apply only to goods originating in countries without a free trade agreement with Mexico — principally China, South Korea, India, Vietnam, Thailand, Brazil, Indonesia, Chinese Taipei, the UAE, and South Africa. The decree formalises at statutory level the September 2024 Sheinbaum executive order placing a 50% duty on finished passenger vehicles from non-FTA states and is framed by the Secretaría de Economía and SHCP as the operational tariff instrument of Plan México (2025-01-21).

The Mexican federal government published the Programa Sectorial de Energía 2025-2030 (PMSE) in the Diario Oficial de la Federación on 22 December 2025, establishing a binding five-year state-led energy-planning mandate for the Sheinbaum administration (2024-2030). The PMSE mandates a 54-46 state-to-private electricity generation mix, sets a 35 GW new clean-generation target by 2030 (13.6 GW from CFE + 22 GW from private/state/community projects), and formally supersedes the prior market-led Estrategia Nacional de Energía 2018-2032 and PRODESEN architecture. The Program is legally mandatory for all federal public administration entities including CFE, PEMEX, CENACE, and CENAGAS, operationalising the 2024 constitutional reform that restored CFE and PEMEX to strategic-sector status under Articles 27 and 28 of the Constitution.

President Claudia Sheinbaum signed a comprehensive reform to Mexico's Customs Law (Ley Aduanera) published in the Diario Oficial de la Federación on 19 November 2025, entering into force 1 January 2026. The decree formally recognises the Agencia Nacional de Aduanas de México (ANAM) as the autonomous customs authority with expanded inspection and fiscalisation powers, creates a new inter-secretarial Consejo Aduanero with binding decisional authority over customs-agent licensing, and mandates real-time electronic traceability and video-surveillance at all recintos fiscales. The reform is Mexico's most comprehensive statutory overhaul of its customs-administration architecture in over a decade, directly conditioning USMCA-origin compliance infrastructure for approximately US$800 billion in annual MX-US trade and over 3,200 IMMEX-registered nearshoring operators.

On 10 November 2025 the Mexican government published a decree in the Diario Oficial de la Federación (DOF) modifying the Tarifa de la Ley de los Impuestos Generales de Importación y de Exportación (LIGIE) to raise most-favoured-nation import tariffs on sugar and sugar-derivative products (raw, refined, liquid and invert sugar, and related high-sugar-content goods across roughly eight six-digit tariff subheadings) to between 156% and 210.44% ad valorem, replacing the prior specific-duty regime of USD 0.33–0.39 per kilogram. The decree entered into force 11 November 2025, the day after publication, and applies to imports from WTO members that lack a preferential trade agreement with Mexico. The Secretaría de Economía framed the increase as protection for the domestic sugarcane agro-industry against a national oversupply and falling international reference prices.

On 2 September 2025 Mexico's Finance Ministry (SHCP) launched a capitalisation and refinancing strategy for state oil company Petróleos Mexicanos (Pemex), opening a USD 12 billion bond repurchase offer (of which USD 9.9 billion targeted 2026-2029 maturities). Between 15-16 September, SHCP placed a new basket of euro- and dollar-denominated bonds totalling USD 13.8 billion equivalent (EUR 5 billion across 4/8/12-year tranches at 3.500%, 4.500% and 5.125% coupons; USD 8 billion across 5/7/10-year tranches at 4.750%, 5.375% and 5.625% coupons), taking the combined operation to roughly USD 21.8 billion. SHCP stated the goal was to strengthen Pemex's capitalisation levels, reduce its financial debt balance, manage supplier obligations, fund investment projects, and improve its debt-maturity profile. The operation is part of the government's 2025-2035 Pemex strategic (rescue) plan and preceded credit-rating upgrades from Fitch (B+ to BB) and Moody's (B3 to B1, stable outlook).

Mexico's tax authority (SAT), acting under SHCP, published the Cuarta Resolución de Modificaciones a las Reglas Generales de Comercio Exterior para 2025 in the Diario Oficial de la Federación on 28 July 2025, raising the flat tax rate applied under the simplified customs regime for low-value courier and parcel shipments (goods valued at USD 2,500 or less) from 19% to 33.5%, effective 15 August 2025. The increase applies to shipments from countries without a free trade agreement with Mexico — in practice overwhelmingly China-origin goods — and is aimed at cross-border e-commerce platforms (Shein, Temu, AliExpress) as well as triangulated goods routed through courier channels by other importers including large retailers. The measure is framed by SHCP as combating under-invoicing and non-tariff-preference triangulation via the courier de minimis channel.

On 26 June 2025, the Governing Board of Mexico's National Banking and Securities Commission (CNBV), invoking Article 129 of the Ley de Instituciones de Crédito, decreed the temporary managerial intervention of CI Banco, S.A. and Intercam Banco, S.A., replacing their administrative bodies and legal representatives. The measure came one day after the US Treasury's FinCEN designated both institutions (along with Vector Casa de Bolsa) as foreign financial institutions of primary money-laundering concern tied to opioid-trafficking networks, and prohibited certain US fund transmittals to them. CNBV/SHCP framed the intervention as a depositor- and creditor-protection measure to safeguard the two banks' operations against the fallout of the US action; Vector Casa de Bolsa was not included in the CNBV intervention.

On 2025-06-02 Mexico published a presidential decree ("DECRETO por el que se fomenta la inversión en territorio nacional, para fortalecer el desarrollo de la industria farmacéutica y la producción de insumos para la salud; así como el desarrollo de investigación científica nacional") in the Diario Oficial de la Federación, effective 2025-06-03. Starting with fiscal-year 2026 consolidated federal purchases of medicines, health inputs and medical devices (for 2027 delivery), the Secretaría de Salud will apply a points-and-percentage evaluation scheme that favors bidders holding productive investment or infrastructure (plants, laboratories, warehouses) in Mexico, or that conduct scientific research domestically. A tri-ministry Promotion Committee (Health, Economy, and the Anticorruption/Public Function ministry) will vet investment commitments, and the decree directs the Secretaría de Salud to issue implementing guidelines within 90 calendar days of publication.

On 22 May 2025, Mexico published a decree in the Diario Oficial de la Federación (DOF) granting fiscal incentives to companies that begin operations within newly designated "Polos de Desarrollo Económico para el Bienestar" (PODECOBI) — Economic Development Poles for Welfare. The decree grants a 100% immediate deduction of the original investment amount in new fixed assets, plus an additional 25% deduction for incremental training and innovation expenses, for taxpayers operating in the poles through fiscal year 2030. The Ministry of Economy designates and administers the poles, with a cross-secretarial promotion committee overseeing site selection; 14 zones spanning Campeche, Chihuahua, Durango, Estado de México, Guanajuato, Hidalgo, Michoacán, Puebla, Quintana Roo, Sinaloa, Sonora, Tamaulipas, Tlaxcala and Veracruz are active as of mid-2025. The measure operationalises the "Plan México" nearshoring strategy by concentrating incentives in specific geographic zones rather than applying them nationwide.

On 21 January 2025, Mexico published the Decree granting tax incentives in support of the national strategy known as "Plan Mexico" in the Diario Oficial de la Federación (DOF). The decree provides MXN 30 billion (~USD 1.5 billion) in fiscal incentives through 2030 to attract nearshoring investment, with MXN 28.5 billion allocated to immediate deductions on new fixed asset investments and MXN 1.5 billion for workforce training and innovation. Deduction rates range from 35% to 91% depending on asset type and sector, with the automotive, aerospace, and semiconductor industries expected to benefit most. The measure aims to capitalize on US-China decoupling by positioning Mexico as an alternative manufacturing base for supply chains serving the North American market.

President Claudia Sheinbaum's government published in the Diario Oficial de la Federación on 19 Dec 2024 a decree amending the General Import & Export Tax Law (TIGIE) and the IMMEX Decree. The decree imposes a 35% temporary import duty on 138 finished-apparel tariff lines (Chapters 61, 62, 63 plus tariff item 9404.40.01) and a 15% duty on 17 textile-input tariff lines (Chapters 52, 55, 58, 60), totalling 155 fractions. Concurrently, 302 tariff fractions in Chapters 61/62/63 are removed from IMMEX duty-deferral eligibility (moved out of Annex II Section C into Annex I). The measure exempts countries with which Mexico has an FTA (notably USMCA partners) and is in force from 20 Dec 2024 until 23 Apr 2026.

Mexico's Secretaría de Economía published in the Diario Oficial de la Federación on 13 September 2023 the final resolution of the administrative sunset review (examen de vigencia) of compensatory (anti-dumping) duties on imports of coated flat steel (aceros planos recubiertos — metallic and/or non-metallic coated carbon and alloy flat products) originating from the People's Republic of China and Chinese Taipei, regardless of country of origin. The resolution confirms that revoking the duties would likely lead to continued or resumed dumping, and therefore extends them for a further five years. Duty rates range from 22.22 % (Baoshan) to 76.33 % (all other Chinese exporters) and from 22.26 % (CSC) to 52.57 % (other Taiwanese exporters).

On 20 April 2022 Mexico's Diario Oficial de la Federación published a reform to the Ley Minera (Mining Law) declaring lithium "patrimonio de la Nación" (national patrimony) and of public utility, adding Article 5 Bis to state that no further concessions, licenses, contracts, permits or authorizations for lithium exploration, exploitation, benefit or use will be granted to private parties — reserving the entire value chain exclusively to the State (Articles 1, 9 and 10 also amended). On 23 August 2022 a follow-on decree created "Litio para México" (LitioMx), a decentralized public agency governed by a board of five cabinet secretaries (Energy as chair, plus Finance, Economy, Interior and Environment) and technically supported by the Mexican Geological Service, holding exclusive rights to explore, exploit and commercialize Mexico's lithium deposits. The law was subsequently upheld as constitutional by Mexico's Supreme Court in March 2026 (Acción de Inconstitucionalidad 78/2022, filed separately).

Mexico's Ley de Comercio Exterior (Foreign Trade Act, LCE), published in the Diario Oficial de la Federación on 27 July 1993 and entering into force 28 July 1993, is the foundational statute governing Mexico's entire external trade regulatory architecture. The LCE establishes the legal authority for the SECOFI/SE-administered antidumping (AD), countervailing duty (CVD), and safeguard investigation regime (Titles V–VII); the TIGIE tariff-schedule and tariff-classification framework; the IMMEX maquila and PROSEC sectoral-promotion programs; rules of origin for USMCA and other preferential trade agreements; and Mexico's export- licensing and strategic-material restriction framework. The LCE has been amended repeatedly through 2021 and remains the overarching parent authority for all Mexican trade-remedy proceedings administered by UPCI (Unidad de Prácticas Comerciales Internacionales) under the Secretaría de Economía.