49 CFR Parts 37 & 38 - Department of Transportation (DOT) ADA Regulations

(c) Compliance with paragraph (b) of this section is not required to the extent that it would significantly alter the historic or antiquated character of a historic or antiquated rail passenger car, or a rail station served exclusively by such cars, or would result in the violation of any rule, regulation, standard or order issued by the Secretary under the Federal Railroad Safety Act of 1970. For purposes of this section, a historic or antiquated rail passenger car means a rail passenger car—

(1) Which is not less than 30 years old at the time of its use for transporting individuals;

(2) The manufacturer of which is no longer in the business of manufacturing rail passenger cars; and

(3) Which—

(i) Has a consequential association with events or persons significant to the past; or

(ii) Embodies, or is being restored to embody, the distinctive characteristics of a type of rail passenger car used in the past, or to represent a time period which has passed.