Americans with Disabilities Act of 1990
The Americans with Disabilities Act (the ADA) is a law that was passed by the United States Congress in 1990.  President George H. W. Bush signed the ADA, making it an official United States law, on July 26, 1990.  Later, President George W. Bush amended (changed) the ADA and signed those changes into law.  The changes started on January 1, 2009.