Maryland Code, Election Law § 10-203

(a) The election director, with the approval of the local board, shall appoint the election judges for each polling place for a term that begins on the Tuesday that is 13 weeks before each statewide primary election.

(b) One or two election judges in each precinct shall:

(c) The term of office for an election judge continues until the Tuesday that is 13 weeks before the next statewide primary election unless:

(d) A local board shall fill each vacant election judge position in the same manner as set forth in subsection (a) of this section.