The Secretary of General Services may periodically enter into contracts with automobile rental firms to supply rental vehicles to using agencies. Using agencies requiring the use of rental vehicles shall acquire them in accordance with the terms and conditions of the State contract or as specified by the Secretary of General Services, or both. Using agencies requiring the use of rental vehicles not covered by the contracts referenced in §A of this regulation may acquire them using applicable small procurement procedures in accordance with COMAR 21.05.07 with the prior approval of the Secretary of General Services.