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.