24 CFR § 983.54 - Prohibition of assistance for units in subsidized housing.
A PHA may not attach or pay PBV assistance to units in any of the following types of subsidized housing:
(a) A public housing dwelling unit;
(b) A unit subsidized with any other form of Section 8 assistance (tenant-based or project-based);
(c) A unit subsidized with any governmental rent subsidy (a subsidy that pays all or any part of the rent);
(d) A unit subsidized with any governmental subsidy that covers all or any part of the operating costs of the housing;
(e) A unit subsidized with Section 236 rental assistance payments (12 U.S.C. 1715z-1). However, the PHA may attach assistance to a unit subsidized with Section 236 interest reduction payments;
(f) A unit subsidized with rental assistance payments under Section 521 of the Housing Act of 1949, 42 U.S.C. 1490a (a Rural Housing Service Program). However, the PHA may attach assistance for a unit subsidized with Section 515 interest reduction payments (42 U.S.C. 1485);
(i) Section 202 supportive housing for the elderly (12 U.S.C. 1701q);
(k) A unit subsidized with any form of tenant-based rental assistance (as defined at 24 CFR 982.1(b)(2)) (e.g., a unit subsidized with tenant-based rental assistance under the HOME program, 42 U.S.C. 12701et seq.);
(l) A unit with any other duplicative federal, state, or local housing subsidy, as determined by HUD or by the PHA in accordance with HUD requirements. For this purpose, “housing subsidy” does not include the housing component of a welfare payment; a social security payment; or a federal, state, or local tax concession (such as relief from local real property taxes).