Md. Code, Environment § 8–107

(a) A county, municipality, or board of health may not adopt or enforce an ordinance, rule, or regulation that is inconsistent with this title or any rule or regulation adopted under this title.

(b) This title does not limit the power of a county, a municipality, or a board of health to adopt ordinances, rules, or regulations that are consistent with this title and the rules and regulations adopted under this title.