Directs the U.S. Ambassador to the United Nations to begin negotiations for a supplemental agreement that would prohibit the U.N. from allowing the International Criminal Court (ICC) to use or lease United Nations facilities located in the United States. The Ambassador must seek to initiate these talks within 30 days after the opening of the 80th U.N. General Assembly.

Includes congressional findings and definitions that underscore the United States’ ratification of the U.N. Charter and the U.N. Headquarters Agreement, the absence of U.S. ratification of the Rome Statute, the statement that the ICC has no jurisdiction in the United States or over U.S. persons, and the fact that the ICC maintains an office at U.N. headquarters. It does not appropriate funds, change taxes, or impose mandates on states or localities.