Md. Code, Business Regulation § 16.7–201

(a) A person must hold an appropriate license before the person may act as:

(1) an electronic smoking devices manufacturer;

(2) an electronic smoking devices retailer;

(3) an electronic smoking devices wholesaler distributor;

(4) an electronic smoking devices wholesaler importer; or

(5) a vape shop vendor.

(b) A place of business in which a person acts as an electronic smoking devices retailer or a vape shop vendor must hold an appropriate license.