Md. Code, Transportation § 11–136

(a) “Motorcycle” means a motor vehicle that:

(1) (i) Has motive power;

(ii) Has a seat or saddle for the use of the rider;

(iii) Is designed to travel:

1. On not more than three wheels in contact with the ground; and

2. At speeds exceeding 35 miles per hour; and

(iv) Is of a type required to comply with all motor vehicle safety standards applicable to motorcycles under federal law; or

(2) Is an autocycle.

(b) A detachable sidecar is an accessory to and not a part of a motorcycle.