(a) Except as provided in subsection (b) of this section, a judge of the court may not act as an attorney at law in a civil or criminal matter during a term of office.
(b) This section does not apply:
(1) In Harford County;
(2) In Montgomery County;
(3) In Baltimore City, to a judge of the Court while practicing law before any court of the State except an orphans’ court; or
(4) In Prince George’s County, Baltimore County, Calvert County, and Howard County, to a judge of the Court while practicing law in connection with a case that is:
(i) Outside the jurisdiction of orphans’ court; and
(ii) Unrelated to the administration of an estate or guardianship.