This part applies to all applicants for, and recipients of, EPA assistance in the operation of programs or activities receiving such assistance beginning February 13, 1984. New construction (§ 7.70) for which design was initiated prior to February 13, 1984, shall comply with the accessibility requirements in the Department of Health, Education and Welfare (now the Department of Health and Human Services) nondiscrimination regulation, 45 CFR 84.23, issued June 3, 1977, or with equivalent standards that ensure the facility is readily accessible to and usable by handicapped persons. Such assistance includes but is not limited to that which is listed in the Catalogue of Federal Domestic Assistance under the 66.000 series. It supersedes the provisions of former 40 CFR parts 7 and 12.