(4) Except as provided in subsections (A)-(D), dwelling units whose rents are controlled or regulated by any government unit, agency, or authority, excepting those unsubsidized and/or unassisted units which are insured by the United States Department of Housing and Urban Development; provided, however, that units in unreinforced masonry buildings which have undergone seismic strengthening in accordance with Existing Building Code Chapters 5B and 5C shall remain subject to the Rent Ordinances to the extent that the ordinance is not in conflict with the seismic strengthening bond program or with the program’s loan agreements or with any regulations promulgated thereunder;
(A) For purposes of Sections 37.2, 37.3(a)(10)(A), 37.4, 37.5, 37.6, 37.9, 37.9A, 37.10A, 37.11A and 37.13, and the arbitration provisions of Sections 37.8 and 37.8A applicable only to the provisions of Sections 37.3(a)(10)(A), the term "rental units" shall include units occupied by recipients of tenant-based rental assistance where the tenant-based rental assistance program does not establish the tenant's share of base rent as a fixed percentage of a tenant's income, such as in the Housing Choice Voucher Program and the Over-FMR Tenancy program, and shall also include units occupied by recipients of tenant-based rental assistance under the HOPWA rental subsidy program;
(B) For purposes of Sections 37.2, 37.3(a)(10)(B), 37.4, 37.5, 37.6, 37.9, 37.9A, 37.10A, 37.11A and 37.13, the term "rental units" shall include units occupied by recipients of tenant-based rental assistance where the rent payable by the tenant under the tenant-based rental assistance program is a fixed percentage of the tenant's income, such as in the Section 8 Certificate Program;