In 1968 and 1973, laws were passed requiring all federally-owned properties and all federally-funded state and local properties to be physically and programmatically accessible to America's disabled population. In 1990, with the passage of the Americans with Disabilities Act (ADA), this mandate was expanded to include nearly all businesses and programs that serve the public, regardless of ownership. Because the 1990 law serves to underscore the 1968 and 1973 accessibility requirements, cultural resource managers nationwide need to evaluate or re-evaluate their own historic properties as soon as possible to be certain they comply. Waiting for discrimination suits to make necessary changes gives Federal agencies a negative image with the very public they are dedicated to serving. Making accessibility changes with insufficient planning is far more costly. Finally, the Nation's irreplaceable historic properties themselves invariably suffer when alterations are made in an unplanned and hastily carried out manner.