The Territories Clause of the United States Constitution (Art. IV, Sec. 3, cl. 2) allows for Congress to "dispose of" Puerto Rico and allow it to become independent of the U.S. (in the same way as the Philippines did in 1945) or, under the authority of the Admissions Clause (Art. IV, Sec. 3, cl. 1) for it to be admitted as a state of the United States (with a vote of Congress in the same way that Alaska and Hawaii were admitted in 1958 and 1959 respectively).