29 U.S. Code Sec. 794
Section 504 of the Rehabilitation Act provides: “No otherwise qualified individual with a disability … shall, solely by reason of her or his disability, be excluded from the participation in, be denied the benefits of, or be subjected to discrimination under any program or activity receiving Federal financial assistance." Applies in employment and housing contexts. There can be no discrimination in housing provided for the elderly and for disabiliites. Also, no discriminiation in subsidized housing. Also applies to mass transit.