* * * * *
(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.