Prevents the President and military funding from being used to invade or seize territory of Canada, the Republic of Panama, or Greenland except when Congress declares war, Congress specifically authorizes the action, or a national emergency exists because of an attack or imminent attack on the United States, its territories, or its armed forces. If U.S. forces are introduced in response to such a national emergency, military funds may be used for that introduction only for a 60-day window starting when the forces are introduced.

The bill also defines what counts as an "introduction of United States Armed Forces" (including assignment to command, coordinating, moving with, or accompanying foreign forces engaged or imminently threatened with hostilities) and says it does not change constitutional war powers or existing treaties and does not apply to activities already reported under the National Security Act reporting rule referenced in the text.