12 C.F.R. § 1807.402
(a) Purchase with or without Rehabilitation.
(1) A Recipient that uses the CMF Award to finance or support the Purchase of Housing by a qualified Homebuyer must ensure that the Housing and Homebuyer meet the affordability requirements of this subpart as follows:
(vi) Resale. To ensure that the CMF Awards are being used for qualifying Families during the Affordability Period, recoupment, replacement, and/or resale strategies must be established and imposed by the Recipient. A recoupment, replacement, and/or resale strategy must ensure that:
(b) Rehabilitation not involving purchase. Single-family housing that is currently owned by a qualifying Family, as set forth in § 1807.400, qualifies as Affordable Housing if it meets the following requirements of this paragraph (b):