Mexico may accept U.S. requests for greater regional content on steel, as long as there is a five-year phase-in period. Foreign Relations Secretary Marcelo Ebrard said a U.S. request for 70% regional content on steel could be written into an addendum to the U.S.-Mexico Canada free trade agreement. But Ebrard said Mexico won't accept such regional content rules on aluminum, because Mexico lacks any aluminum production. Ebrard repeated Mexico's refusal to accept requests for U.S.