Maryland Code, Transportation § 16-210

(a) On canceling, suspending, or revoking a driver's license, the Administration shall require that the license be surrendered to the Administration.

(b) At the end of a suspension period, the Administration shall issue a driver's license to the licensee.

(c) When the Administration suspends or revokes a Maryland driver's license or issues a restricted license, the suspension, revocation, or restriction is effective at the time the decision is rendered, unless otherwise ordered by the Administration.

(d) Credit for the term of the suspension, revocation, or period of restriction shall begin only after the Administration has received: