24 C.F.R. § 982.456

(a) Even if the family continues to occupy the unit, the PHA may exercise any rights and remedies against the owner under the HAP contract.

(b)(1) The family is not a party to or third party beneficiary of the HAP contract. Except as provided in paragraph (b)(2) of this section, the family may not exercise any right or remedy against the owner under the HAP contract.

(2) The tenant may exercise any right or remedy against the owner under the lease between the tenant and the owner, including enforcement of the owner's obligations under the tenancy addendum (which is included both in the HAP contract between the PHA and the owner; and in the lease between the tenant and the owner.)

(c) The HAP contract shall not be construed as creating any right of the family or other third party (other than HUD) to enforce any provision of the HAP contract, or to assert any claim against HUD, the PHA or the owner under the HAP contract.