Maryland Criminal Law Section 13-202
§ 13-202.
  Except as otherwise provided in this title, this subtitle applies in the following counties:
    (1)   Allegany County;
    (2)   Anne Arundel County;
    (3)   Baltimore County;
    (4)   Calvert County;
    (5)   Caroline County;
    (6)   Carroll County;
    (7)   Dorchester County;
    (8)   Frederick County;
    (9)   Garrett County;
    (10)   Howard County;
    (11)   Prince George's County;
    (12)   St. Mary's County;
    (13)   Somerset County;
    (14)   Talbot County; and
    (15)   Washington County.