The purpose of this legislation is to prevent the International Criminal Court (ICC) from using United Nations facilities located in the United States, specifically in New York City. The main objective is to ensure that the ICC, which the U.S. has not ratified and does not recognize jurisdiction over U.S. citizens, cannot operate from U.N. premises in the country. Key provisions of the legislation include a requirement for the U.S. Ambassador to the United Nations to initiate negotiations for a supplemental agreement to the existing United Nations Headquarters Agreement.