49 CFR Part 37 - Transportation for Individuals With Disabilities at Intercity, Commuter, and High Speed Passenger Railroad Station Platforms; Miscellaneous Amendments

(a) In addition to meeting the requirements of sections 37.9 and 37.41, an operator of a commuter, intercity, or high-speed rail system must ensure, at stations that are approved for entry into final design or that begin construction or alteration of platforms on or after February 1, 2012, that the following performance standard is met: individuals with disabilities, including individuals who use wheelchairs, must have access to all accessible cars available to passengers without disabilities in each train using the station.