(a) The USMCA replaces the 1994 North American Free Trade Agreement. The USMCA Preamble states that the parties to the agreement are resolved to, among other things, “facilitate trade in goods and services between the Parties by preventing, identifying, and eliminating unnecessary technical barriers to trade, enhancing transparency, and promoting good regulatory practices,” and that the Parties are resolved to “promote the protection and enforcement of labor rights, the improvement of working conditions, the strengthening of cooperation and the Parties' capacity on labor issues.”

(b) The purpose of the USMCA Implementation Act is to implement the USMCA. Section 202A of the Act, codified at 19 U.S.C. 4532, in part implements Article 7 of the Automotive Appendix. This Article establishes a labor value content requirement for passenger vehicles, light trucks, and heavy trucks, pursuant to which an importer can obtain preferential tariff treatment for a covered vehicle only if it meets certain minimum percentage benchmarks concerning the portion of the vehicle produced by workers who meet certain wage requirements, as described in subparts B, C, and D.