(a) Every development shall incorporate features which will make the development accessible by the physically handicapped. The standards in the ``American Standard Specifications for Making Buildings and Facilities Accessible to, and Usable by the Physically Handicapped,'' published by the American National Standards Institute, Inc. (ANSI A 117.1-1961 (1971)), are recommended.
(b) Where a development includes a historic structure, the Advisory Council on Historic Preservation's policy, ``Supplementary Guidance--Handicapped Access to Historic Properties,'' (45 FR 9757, Feb. 13, 1980), should be observed.