Expressing the sense of Congress that the proposed "joint interpretation" of Annex 14-C of the United States-Mexico-Canada Agreement prepared by United States Trade Representative Katherine Tai is of no legal effect with respect to the United States or any United States person unless it is approved by Congress.

This measure says a recent “joint interpretation” of a trade rule in the US‑Mexico‑Canada Agreement (USMCA) has no legal force in the U.S. unless Congress approves it. It also says federal agencies can’t use that interpretation in court or claim it affects any legal claims by U.S. people. The rule at issue (Annex 14‑C) deals with certain investment claims tied to the older NAFTA agreement that came before USMCA .

Key points:

• Who is affected: U.S. people with investment claims connected to NAFTA-era rules, and federal agencies handling trade or legal matters .
• What changes: The proposed interpretation has no legal effect without Congress; agencies can’t rely on it in legal cases or say it changes U.S. people’s claims .
• When: Applies unless and until Congress approves that interpretation .