; (B) the expiration of a rental assistance contract for which the tenants are not eligible for enhanced voucher or tenant protection assistance under existing law; or (C) the expiration of affordability restrictions accompanying a mortgage or preservation program administered by the Secretary: Provided further , That such tenant protection assistance made available under the previous proviso may be provided under the authority of section 8(t) or section 8(o)(13) of the United States Housing Act of 1937 ( 42 U.S.C. 1437f(t) ): Provided further , That any tenant protection voucher made available from amounts under this paragraph shall not be reissued by any public housing agency, except the replacement vouchers as defined by the Secretary by notice, when the initial family that received any such voucher no longer receives such voucher, and the authority for any public housing agency to issue any such voucher shall cease to exist: Provided further , That the Secretary may provide section 8 rental assistance from amounts made available under this paragraph for units assisted under a project-based subsidy contract funded under the Project-Based Rental Assistance heading under this title where the owner has received a Notice of Default and the units pose an imminent health and safety risk to residents: Provided further , That to the extent that the Secretary determines that such units are not feasible for continued rental assistance payments or transfer of the subsidy contract associated with such units to another project or projects and owner or owners, any remaining amounts associated with such units under such contract shall be recaptured and used to reimburse amounts used under this paragraph for rental assistance under the preceding proviso