; (e) Selection The Secretary shall select applicants to receive grants based on criteria that the Secretary shall establish. (f) Authorization of appropriations There are authorized to be appropriated $25,000,000 for each of fiscal years 2018 through 2022 for grants under this section. 10. Definitions For purposes of this Act, the following definitions shall apply: (1) Multifamily housing project The term multifamily housing project means a housing project consisting of five or more dwelling units. (2) Rental assistance voucher The term rental assistance voucher means a voucher for rental assistance made available under section 8(o) of the United States Housing Act of 1937 ( 42 U.S.C. 1437f(o) ). (3) Secretary The term Secretary means the Secretary of Housing and Urban Development. (4) Voucher user The term voucher user means a family who is renting a dwelling unit using a rental assistance voucher. 11. Regulations The Secretary may issue any regulations necessary to carry out this Act.