Md. Code, Transportation § 11–134.5

(a) “Motor scooter” means a nonpedal vehicle that:

(1) Has a seat for the operator;

(2) Has two wheels, of which one is 10 inches or more in diameter;

(3) Has a step-through chassis;

(4) Has a motor:

(i) With a rating of 2.7 brake horsepower or less; or

(ii) If the motor is an internal combustion engine, with a capacity of 50 cubic centimeters piston displacement or less; and

(5) Is equipped with an automatic transmission.

(b) “Motor scooter” does not include:

(1) An electric low speed scooter; or

(2) A vehicle that has been manufactured for off–road use, including a motorcycle and an all–terrain vehicle.