Md. Code, Transportation § 16–809

A person may drive a commercial motor vehicle if:

(1) The person holds a valid commercial driver’s license issued by any:

(i) State in accordance with the minimum federal standards for the issuance of a commercial driver’s license; or

(ii) Foreign jurisdiction that the United States Department of Transportation has determined issues commercial drivers’ licenses in accordance with the minimum federal standards;

(2) The person’s driver’s license is not refused, suspended, revoked, or canceled;

(3) The person is not disqualified from driving a commercial motor vehicle in any state;

(4) The person is not disqualified from driving a commercial vehicle by the United States Department of Transportation;

(5) The person is not subject to an out-of-service order as defined in § 16-812(i)(1)(ii) of this subtitle;

(6) The person has the commercial driver’s license in the person’s possession; and

(7) The person’s commercial driver’s license is valid for the type of vehicle being driven, as determined by regulation established by the United States Department of Transportation.