Md. Code, Transportation § 5–812

(a) Unless a person has an appropriate permit issued by the political subdivision, the person may not, in a noise zone established under this part:

(1) Establish or construct any new structure;

(2) Make any new use of any existing structure or land; or

(3) Substantially alter any existing structure or use of land.

(b) A political subdivision may not grant a permit if the proposed action would enlarge the size of or create an impacted land use area.

(c) Before a political subdivision acts on any permit application, the political subdivision shall notify the Administration of the application and give the Administration an opportunity to comment.