The "Illegitimate Court Counteraction Act" aims to impose sanctions on the International Criminal Court (ICC) in response to its efforts to investigate, arrest, detain, or prosecute individuals deemed "protected persons" of the United States and its allies. This action is motivated by the belief that the ICC lacks legitimate jurisdiction over the U.S. and Israel, neither of which are parties to the Rome Statute, and specifically condemns the ICC's recent actions against Israeli officials. The bill mandates the President to impose sanctions on any foreign person, and their immediate family members, who directly engage in or materially support ICC efforts against protected persons. These sanctions include blocking property within U.S. jurisdiction and rendering individuals inadmissible for U.S. visas , with existing visas subject to immediate revocation. The President must notify Congress of any sanctions imposed and can waive them for national security reasons or terminate them if the ICC ceases all such efforts. A "protected person" is broadly defined to include any U.S. person, such as military members and government officials, as well as citizens or lawful residents of U.S. allies who have not consented to ICC jurisdiction. Furthermore, the legislation immediately rescinds all existing U.S. funds appropriated for the ICC and explicitly prohibits any future appropriations to the court.