(a) This part applies to each recipient of Federal financial assistance from the Department of Transportation and to each program or activity that receives such assistance.

(b) Design, construction, or alteration of buildings or other fixed facilities by public entities subject to part 37 of this title shall be in conformance with appendices B and D of 36 CFR part 1191, as modified by appendix A to part 37 of this title. All other entities subject to section 504 shall design, construct, or alter buildings, or other fixed facilities, in conformance with appendices B and D of 36 CFR part 1191, as modified by appendix A to part 37 of this title.