Maryland Code, Land Use § 20-703

(1) the county may not impose the administrative tax provided for under § 18-307 of this article in a prior established municipal corporation;

(2) any local law adopted by the Commission, county planning board, or district council does not apply to a prior established municipal corporation; and

(3) §§ 20-401 and 20-502 through 20-504 of this title and Title 22, Subtitle 1 and §§ 22-308, 23-102, 23-103, 23-301, and 23-302 of this article do not apply to a prior established municipal corporation.