Md. Code, Commercial Law § 7–201

(a) A warehouse receipt may be issued by any warehouse.

(b) If goods, including distilled spirits and agricultural commodities, are stored under a statute requiring a bond against withdrawal or a license for the issuance of receipts in the nature of warehouse receipts, a receipt issued for the goods is deemed to be a warehouse receipt even if issued by a person that is the owner of the goods and is not a warehouse.