Below is the CFR text, enacted by the ADA, that requires that vehicles procured for service on fixed route systems must be wheelchair accessible.
§37.71 Purchase or lease of new non-rail vehicles by public entities operating fixed route systems.
(a) Each public entity operating a fixed route system making a solicitation after August 25, 1990, to purchase or lease a new bus or other new vehicle for use on the system, shall ensure that the vehicle is readily accessible to and usable by individuals with disabilities, including individuals who use wheelchairs.
Source: [56 FR 45621, Sept. 6, 1991, as amended at 76 FR 57936, Sept. 19, 2011]
Updated January 2018