To direct the removal of United States Armed Forces from hostilities within or against the Republic of Cuba that have not been authorized by Congress.

In plain language: This joint resolution directs the President to remove U.S. Armed Forces from hostilities within or against Cuba unless a declaration of war or authorization to use military force for such purpose has been enacted. The resolution specifies that it shall not be construed to prevent the United States from defending itself from an armed attack, the threat of an imminent armed attack, or the lawful execution of counternarcotics operations.

Provisional: our plain-language summary, pending review.