H.R. 8103 would block the federal government from spending any money on military operations against Cuba from the bill's enactment through December 31, 2026, unless Congress first declares war on Cuba or passes a new law specifically authorizing such military action in compliance with the War Powers Resolution. The bill, introduced by Representative Jayapal and 18 other House members, affects all federal agencies and the military by restricting their ability to use appropriated funds for military force against Cuba during this period. The measure includes a narrow exception for military actions that comply with the War Powers Resolution's emergency provisions, which allow limited military operations under specific circumstances. This legislation would require Congress to take explicit action before any military intervention against Cuba could proceed, reinforcing congressional oversight of military decisions.