Maryland Code, Transportation § 8-722

(a) Except for payment of the annual fee required by § 8-718 of this subtitle, this part does not affect any outdoor sign in existence on June 1, 1931, unless the sign:

(b) If the outdoor sign affects adversely the safety of public travel or is dangerously lighted as described in subsection (a) of this section, the Administration may remove the sign as provided in Part VI of this subtitle, after 15 days' written notice and an opportunity to be heard.

(c) Any person whose outdoor sign is ordered removed under this section may appeal to the circuit court for the county in which the sign is located. The appeal shall be heard de novo.