The bill H.R. 573 (H.R. 573) (long title: To amend Public Law 93-435 with respect to the Northern Mariana Islands, providing parity with Guam, the Virgin Islands, and American Samoa) is a bill that was introduced into the United States House of Representatives in the 113th United States Congress. The bill would extend the geographic boundaries of the Commonwealth of the Northern Mariana Islands and would allow the United States Military to establish naval defensive sea areas and airspace reservations when necessary for national defense.