Md. Code, Transportation § 22–405.3

If a new Class A (passenger) or Class M (multipurpose) motor vehicle is sold in this State, the manufacturer shall equip the motor vehicle with a spare tire that conforms with the requirements in § 22–405 of this subtitle, unless:

(1) The tire–wheel system of the motor vehicle provides a run–flat capability by which a partially inflated driving surface becomes available in the event of a tire failure;

(2) The motor vehicle is equipped with a factory–installed temporary tire repair and inflation system; or

(3) Technological improvements, consistent with applicable federal motor vehicle safety standards, become available.