Americans with Disabilities Act - Full Regulatory History

49 CFR PARTS 27, 37, 38 Preamble--Transportation for Individuals with Disabilities [September 6, 1991]
49 CFR PARTS 37 and 38 Amendment (11-30-93) Transportation for Individuals with Disabilities --Detectable Warnings, Standees on Lifts, Equivalent Facilitation, Priority Seating, and Rail Car Acquisition
49 CFR PARTS 37 and 38 Amendment (5-21-96) Transportation for Individuals with Disabilities --Bus Stop Accessibility, Paratransit Plan Updates, Visitor Eligibility, and Equivalent Facilitation
49 CFR PART 37 Amendment (7-29-96) Americans With Disabilities Act Accessibility Guidelines; Detectable Warnings, Extension of Suspension
49 CFR PART 37 Amendment (11-23-98) Americans With Disabilities Act Accessibility Guidelines; Detectable Warnings, Extension of Suspension
49 CFR PART 37 Amendment (10-30-06) Transportation for Individuals with Disabilities; Adoption of New Accessibility Standards
49 CFR PARTS 37 and 38 Amendment (9-19-11)  Transportation for Individuals With Disabilities at Intercity, Commuter, and High Speed Passenger Railroad Station Platforms; Miscellaneous Amendments (PDF)