Maryland Code, TRANSPORTATION 13-412
(b) (1) The Administration may issue a temporary authorization certificate permitting a vehicle to be driven pending the issuance of current validation tabs.
(2) A temporary authorization certificate:
(i) Shall be issued for a period determined by the Administration not to exceed 15 days; and
(ii) Is not transferable and may not be used on another vehicle other than the one to which it was issued.
(3) A fee for a temporary authorization certificate may be established by the Administration.
(c) The Administration shall adopt rules and regulations to govern the issuance, display, and expiration of registrations, registration cards, registration plates, temporary authorization certificates, and validation tabs.