Md. Code, Transportation § 8–742

This part does not prohibit the erection or maintenance of:

(1) Any on premise outdoor sign that complies with § 8-744 of this subtitle;

(2) Any outdoor sign used to identify a church or a historical monument or location, if the sign is erected in accordance with the rules and regulations of the Administration; or

(3) Any outdoor sign along a highway that is not an expressway, even if the highway runs parallel or partially parallel to an expressway, if the sign faces that highway.