Md. Code, Alcoholic Beverages and Cannabis § 13–207

(a) The Board may adopt regulations to carry out this article, including regulations regarding:

(1) the presence on a licensed premises of an individual who is not a consumer; and

(2) the issuance of a license when the actual use of the license is to be deferred until the completion of construction or alterations on the premises.

(b) The Board shall:

(1) publish notice of an intended action to change or adopt regulations at least 30 days before the effective date of the proposed regulations in a newspaper of general publication in the county; and

(2) give all interested persons a reasonable opportunity to submit data or views orally or in writing before the effective date of the regulations.