It authorizes the President to use “all means necessary and appropriate to bring about the release of any US or allied personnel being detained or imprisoned by, on behalf of, or at the request of the International Criminal Court”. This has led opponents of the act to call it The Hague Invasion Act.
The Act prohibits federal, state and local governments and agencies (including courts and law enforcement agencies) from assisting the Court. For example, it prohibits the extradition of any person from the United States to the Court; it prohibits the transfer of classified national security information and law enforcement information to the Court; and it prohibits agents of the Court from conducting investigations in the United States.
The Act also prohibits U.S. military aid to countries that are party to the Court. However, exceptions are allowed for aid to NATO members, major non-NATO allies, Taiwan, and countries which have entered into “Article 98 agreements”, agreeing not to hand over U.S. nationals to the Court. Furthermore, the President may waive this prohibition where he determines that to do so is “important to the national interest of the United States”.