Md. Code, Election Law § 9–204

(a) Subject to the other provisions of this subtitle and to different presentations required or made desirable by different voting systems, all ballots used in an election shall be as uniform as possible.

(b) Except as otherwise specifically provided in this title, or unless a provision is clearly inappropriate to absentee ballots, the provisions of this subtitle relating to ballot content and arrangement shall apply to the arrangement of absentee ballots.

(c) If applicable for the voting system in use, the appropriate components of the voting system shall be configured for a primary election to permit the voter to vote only for the candidates for which the voter is entitled to vote.