Maryland Code, Alcoholic Beverages and Cannabis § 23-1904

(a)(1) The holder of a Class A license or an employee of the license holder may deliver alcoholic beverages only within the county.

(2) An employee making a delivery shall meet the age requirements of § 23-1902 of this subtitle.

(1) the individual receiving the delivery claimed to be at least 21 years old and the claim was supported by documentary evidence;

(2) the individual receiving the delivery knew that it is a criminal offense for alcoholic beverages to be given to an individual under the age of 21 years; and

(3) the deliverer examined the recipient's identification.

(1) or another individual at least 21 years old designated by the purchaser, is physically present to receive the alcoholic beverages at the time and place of delivery; and

(2) pays for the purchase at the time of the order.