Maryland Code, BUSINESS REGULATION 16.5-206
(b) At least 1 month before a license issued under this subtitle expires, the issuing official shall mail to the licensee, at the last known address of the licensee, a renewal notice that states:
(1) the date on which the current license expires; and
(2) the date by which the issuing official must receive the renewal application for the renewal to be issued and mailed before the license expires.
(c) Before a license issued under this subtitle expires, the licensee may renew it for an additional 1-year term, if the licensee:
(1) otherwise is entitled to be licensed;
(2) submits to the issuing official a renewal application on the form that the issuing official requires; and
(3) pays to the issuing official the license fee required under § 16.5-203 of this subtitle.
(d) The issuing official shall renew the license of each licensee who meets the requirements of this section.