On July 31, 2026, the Mexican Tax Administration Service (“SAT”) published the Advance Version of the Second Resolution Amending the General Foreign Trade Rules for 2026, as well as amendments to Annexes 1 and 2. Among the most significant changes is the extension of the mandatory implementation date of the Electronic Customs Value Declaration (Manifestación de Valor Electrónica or “MVE”) until October 1, 2026. In addition, through December 31, 2026, importers will not be required…