The Americans with Disabilities Act (ADA) was signed into law on July 26, 1990. Some parts of the ADA didn’t go into effect until after that date to give entities time to comply with the law, but those compliance deadlines have passed.
Additional information on the history and background on the law is available on the U.S. Department of Justice’s Civil Rights Division website at: https://www.ada.gov/2010_regs.htm.
For additional information, take a look at the following resources:
What is the Americans with Disabilities Act (ADA)?