Web Site Accessibility for Persons with Disabilities
http://www.osec.doc.gov/webresources/Policy6_508AccessibilityHome.html

U.S. Department of Commerce
2001

Abstract:

Explains how to meet each Section 508 web design standard. The basic accessibility rules for Web sites were developed by the Architectural and Transportation Barriers Compliance Board (Access Board) and are contained in Section 22 of the regulations which implement Section 508.