Each building or part of a building that is constructed or altered by, on behalf of, or for the use of the Department shall be designed, constructed, or altered so as to be readily accessible to and usable by individuals with handicaps. The definitions, requirements and standards of the Architectural Barriers Act (42 U.S.C. 4151-4157), as established in 41 CFR 101-19.600-607, apply to buildings covered by this section, except for military facilities of the Coast Guard, which are covered by 32 CFR part 56.