US Code
SUBCHAPTER IV— GENERAL PROVISIONS
§ 1644. Communication between State and local government agencies and Immigration and Naturalization Service

Notwithstanding any other provision of Federal, State, or local law, no State or local government entity may be prohibited, or in any way restricted, from sending to or receiving from the Immigration and Naturalization Service information regarding the immigration status, lawful or unlawful, of an alien in the United States.