Public Law 111-256 was approved on October 5, 2010. The act changed language in Federal Law from “mental retardation” to “intellectual disability.” References to a “mentally retarded person” were changed to “an individual with an intellectual disability.”
Reference:
Office of the Federal Register, National Archives and Records Administration. (2010, October 4). Public Law 111 - 256 - Rosa's Law. [Government]. U.S. Government Printing Office. https://www.govinfo.gov/app/details/PLAW-111publ256.