US Seeks to Alter Non-Automotive Manufacturing Rules of Origin in T-MEC

Web Editor

December 28, 2025

a man in a factory checking out a piece of black material on a conveyor belt with people in the back

Background on the United States Trade Representative (USTR) and T-MEC

The United States Trade Representative (USTR), led by Jamieson Greer, has proposed changes to the rules of origin for non-automotive manufacturing goods in the United States-Mexico-Canada Agreement (T-MEC). This adjustment aims to strengthen industries in the US, Mexico, and Canada, particularly for critical products like electronics.

Current Trade Landscape and T-MEC Changes

In 2018, the first administration of President Donald Trump introduced significant changes to the T-MEC, replacing the North American Free Trade Agreement (NAFTA). One of these changes was to tighten rules of origin, particularly in the automotive sector. This has led to increased use of domestic inputs, parts, and components in North American-traded goods while restricting supply chains from other regions.

As per the T-MEC, the Regional Value Content for flat-screen televisions is 60%, parts are at 40%, and manufacturing of electrical goods requires a 50% regional value content, as per data from Mexico’s central bank (Banxico).

Import Shifts and Market Participation

Jason Marczak, Vice President and Senior Director of the Adrienne Arsht Latin America Center at the Atlantic Council in Washington, noted a substantial decrease in US imports from China across various sectors over recent years. This shift has been particularly noticeable in machinery, medical equipment, metals, plastics, and rubber.

“There has been almost an 8% reduction in all imports from China, while we’ve seen growth in imports from our North American partners,” Marczak mentioned during T-MEC review consultations.

Marczak believes that further harmonization and modernization of customs procedures, including potential standardization of origin certificates in the three countries, could reduce ambiguity around a product’s original source and minimize confusion among the nations.

Key Questions and Answers

  • What is the USTR’s proposal? The USTR, led by Jamieson Greer, seeks to alter the rules of origin for non-automotive manufacturing goods in the T-MEC to bolster industries in the US, Mexico, and Canada.
  • Why are these changes necessary? The objective is to ensure that trade benefits from non-automotive manufacturing goods flow substantially to the T-MEC parties, especially for critical products like electronics.
  • How have import patterns shifted? There has been a significant reduction in US imports from China across various sectors, with growth in imports from North American partners.
  • What are the potential benefits of harmonizing customs procedures? Standardization of origin certificates in the three countries could reduce ambiguity around a product’s original source and minimize confusion.

Impact on Mexican Exports

According to Banco Base analysts, the growth in Mexican non-automotive exports is due to the US tariffs under the International Emergency Economic Powers Act (IEEPA) not being enforced strictly and Mexico’s high compliance with the T-MEC. Meanwhile, sectoral tariffs applied to the automotive sector are being enforced, causing a 4.6% contraction in automotive exports over the first eleven months.