(a) This section applies to any public entity operating a fixed route system which takes one of the following actions:

(1) After August 25, 1990, remanufactures a bus or other vehicle so as to extend its useful life for five years or more or makes a solicitation for such remanufacturing; or

(2) Purchases or leases a bus or other vehicle which has been remanufactured so as to extend its useful life for five years or more, where the purchase or lease occurs after August 25, 1990, and during the period in which the useful life of the vehicle is extended.

(b) Vehicles acquired through the actions listed in paragraph (a) of this section shall, to the maximum extent feasible, be readily accessible to and usable by individuals with disabilities, including individuals who use wheelchairs.

(c) For purposes of this section, it shall be considered feasible to remanufacture a bus or other motor vehicle so as to be readily accessible to and usable by individuals with disabilities, including individuals who use wheelchairs, unless an engineering analysis demonstrates that including accessibility features required by this part would have a significant adverse effect on the structural integrity of the vehicle.

(d) If a public entity operates a fixed route system, any segment of which is included on the National Register of Historic Places, and if making a vehicle of historic character used solely on such segment readily accessible to and usable by individuals with disabilities would significantly alter the historic character of such vehicle, the public entity has only to make (or purchase or lease a remanufactured vehicle with) those modifications to make the vehicle accessible which do not alter the historic character of such vehicle, in consultation with the National Register of Historic Places.

(e) A public entity operating a fixed route system as described in paragraph (d) of this section may apply in writing to the FTA Administrator for a determination of the historic character of the vehicle. The FTA Administrator shall refer such requests to the National Register of Historic Places, and shall rely on its advice in making determinations of the historic character of the vehicle.