; and (B) parcel post not exceeding 15 pounds in weight. (4) Limitations (A) Number An individual shall be eligible for 1 voucher for each month in which such individual is a qualified individual. (B) Use Any such voucher may not be used— (i) for more than a single qualified mailing; or (ii) beyond the expiration date of such voucher, as designated by the Secretary of Defense. (5) Coordination rule Postal benefits under this Act shall be in addition to, and not in lieu of, any reduced rates of postage or other similar benefits which might otherwise be available by or under law, including any rates of postage resulting from the application of section 3401(b) of title 39, United States Code. (d) Regulations Not later than 30 days after the date of the enactment of this Act, the Secretary of Defense (in consultation with the Postal Service) shall prescribe any regulations necessary to carry out this Act, including— (1) procedures by which vouchers will be provided or made available in a timely manner to persons duly identified by qualified individuals to receive those vouchers