This bill, titled the "No Unauthorized War in Mexico Act," seeks to restrict the use of federal funds for military force in or against Mexico. It prohibits the obligation or expenditure of any appropriated funds for such actions from the bill's enactment until December 31, 2026 . This prohibition is lifted only if Congress declares war on Mexico or provides specific statutory authorization for military force after the bill's passage, adhering to the requirements of the War Powers Resolution. An exception permits military actions consistent with Section 2(c) of the War Powers Resolution, which generally covers situations involving the protection of U.S. citizens or forces from imminent threat.