US Successfully Resolves Labor Complaint at Modern Metal Alloys in Mexico

Web Editor

July 21, 2025

a semi truck with two large tanks on the back of it's trailer in a parking lot with palm trees, Elbr

Background on Modern Metal Alloys and its Significance

Modern Metal Alloys, S.A. de C.V. (MMA) is a significant aluminum manufacturing facility located in Querétaro, Mexico. The company plays a crucial role in producing aluminum parts for the automotive industry, making it an essential player within the North American automotive supply chain.

The Labor Complaint and Resolution

The United States government announced the successful resolution of a labor complaint under the United States-Mexico-Canada Agreement’s (T-MEC) Rapid Response Mechanism (RRM) at Modern Metal Alloys, S.A. de C.V.

This resolution enables the United States to resume tariff liquidation on goods produced by MMA, which manufactures aluminum for automotive parts production.

Collaborative Efforts Leading to Resolution

The successful resolution was achieved through the collaboration of the Mexican government, the International Labor Affairs Office of the U.S. Department of Labor, and the U.S. Trade Representative’s Office, who facilitated the process to address workers’ claims.

Actions Taken by Modern Metal Alloys

  • Reinstatement of a dismissed worker with back pay and full compensation, who was fired in retaliation for their union activities.
  • Restoration of workers to their previous job assignments after being reassigned due to union activities.
  • Granting access to the union with the recognized representation certificate to the company’s facilities.
  • Negotiating a new collective bargaining agreement with the legitimate union.
  • Adopting and implementing a neutrality statement and guidelines on freedom of association and collective bargaining, including zero-tolerance policies for violations with staff training.
  • Establishing an anonymous complaint mechanism for workers to report rights violations.

Mexican Government’s Actions

The Mexican government also took steps to:

  • Provide in-person training for all company personnel on freedom of association and collective bargaining.
  • Set up an email address for workers to anonymously report intimidation, coercion, or threats related to union selection and activities, as well as lack of neutrality or interference in internal union matters.

Supervision by STPS and Tariff Liquidation Resumption

The Mexican Social Security and Immigration Institute (STPS) will oversee the implementation and maintain dialogue with workers and the company throughout the review period.

Following these measures, the U.S. Trade Representative ordered the Treasury Secretary to resume tariff liquidation on unliquidated goods from the facility.

Understanding the T-MEC Rapid Response Mechanism (RRM)

The T-MEC Rapid Response Mechanism (RRM) was established during the Trump administration to level the playing field for U.S. workers and companies by preventing Mexican firms from gaining a competitive advantage through labor law violations.

Key Questions and Answers

  • What is the T-MEC Rapid Response Mechanism (RRM)? The RRM is a trade tool created under the Trump administration to ensure fair competition between U.S. workers and companies by preventing Mexican firms from exploiting labor law loopholes.
  • Who was involved in resolving the labor complaint at Modern Metal Alloys? The resolution was achieved through collaboration between the U.S. and Mexican governments, along with the U.S. Department of Labor and the U.S. Trade Representative’s Office.
  • What actions did Modern Metal Alloys take to address the labor complaint? The company reinstated a dismissed worker with back pay, restored workers to their previous job assignments, granted union access, negotiated a new collective bargaining agreement, adopted neutrality guidelines, and implemented an anonymous complaint mechanism.
  • What role did the Mexican government play in resolving the labor complaint? The Mexican government provided training on freedom of association and collective bargaining, established an anonymous reporting system for workers, and collaborated with the U.S. in addressing the labor complaint.