Architectural Barriers Act (ABA; Public Law 90-480) – The ABA, enacted in 1968, requires that all buildings and facilities constructed in whole or in part using Federal funds must be accessible to, and usable by, physically disabled persons. This includes any construction, renovation, restoration, remodeling, or site development completed by Federal agencies. The Architectural Barriers Act Accessibility Standards (ABAAS) are the official standards for implementing the ABA, and are available at the U.S. Access Board website.  Anyone may file complaints about violations of the ABA with the Architectural and Transportation Barriers Compliance Board (U.S. Access Board), 1331 F St., N.W.; Suite 1000, Washington, D.C. 20004‑1111. 

Proposed Accessibility Guidelines for Outdoor Developed Areas – The U.S. Access Board is finalizing official Federal guidelines for accessible outdoor recreation areas.   In the meantime, agencies are encouraged to use the Proposed Accessibility Guidelines for Outdoor Developed Areas (including trails) for guidance, available at the U.S. Access Board website.

Section 504 of the Rehabilitation Act of 1973 (P.L. 93-112), as amended – Section 504 states that all Federal programs, activities, and services must be accessible to disabled visitors, including those with physical, hearing, visual, and learning impairments (federally assisted programs must also comply with this section). The Department of the Interior (DOI) issued Regulations on the Enforcement of Nondiscrimination on the Basis of Handicap in DOI Programs (43 CFR 17.501-17.570) in 1982.  Persons with disabilities may file complaints about inaccessible programs, activities, and services with the DOI Office for Equal Opportunity, 1849 C St., N.W., Washington, D.C. 20240.