Maryland Code, Transportation § 8-717

(b)(1) A permit issued under this part may be renewed annually on application and payment of the required fee.

(2) If the renewal fee for a permit is not paid by July 1 of a permit year, the Administration may charge a $5 late fee for the permit.

(3) If the renewal fee for a permit is not paid by October 1 of a permit year, the Administration may remove the outdoor sign for which the fee is not paid, as provided in Part VI of this subtitle.