24 C.F.R. § 578.37
(a) Continuum of Care funds may be used to pay for the eligible costs listed in § 578.39 through § 578.63 when used to establish and operate projects under five program components: permanent housing; transitional housing; supportive services only; HMIS; and, in some cases, homelessness prevention. Although grant funds may be used by recipients and subrecipients in all components for the eligible costs of contributing data to the HMIS designated by the Continuum of Care, only HMIS Leads may use grant funds for an HMIS component. Administrative costs are eligible for all components. All components are subject to the restrictions on combining funds for certain eligible activities in a single project found in § 578.87(c). The eligible program components are:
(1) Permanent housing (PH). Permanent housing is community-based housing, the purpose of which is to provide housing without a designated length of stay. Grant funds may be used for acquisition, rehabilitation, new construction, leasing, rental assistance, operating costs, and supportive services. PH includes:
(ii) Rapid rehousing. Continuum of Care funds may provide supportive services, as set forth in § 578.53, and/or short-term (up to 3 months) and/or medium-term (for 3 to 24 months) tenant-based rental assistance, as set forth in § 578.51(c), as necessary to help a homeless individual or family, with or without disabilities, move as quickly as possible into permanent housing and achieve stability in that housing. When providing short-term and/or medium-term rental assistance to program participants, the rental assistance is subject to § 578.51(a)(1), but not § 578.51(a)(1)(i) and (ii); (a)(2); (c) and (f) through (i); and (l)(1). These projects:
(b) Uses of assistance. Funds are available to pay for the eligible costs listed in § 578.39 through § 578.63 when used to: