Maryland Code, Land Use § 16-305

(a)(1) A petition for an election of an exclusive representative may be submitted to the Labor Commissioner by:

(2) The Labor Commissioner may accept a petition from the Commission only if the Labor Commissioner finds, on investigation of the petition, that a valid question of representation exists.

(1) the Labor Commissioner; and

(2) secret ballot.

(1) the name of each employee organization that submits a valid petition;

(2) the name of any other employee organization supported by a valid petition signed by more than 10% of the eligible employees in the bargaining unit; and

(3) an option for no representation.

(d)(1) If none of the choices on the ballot receives a majority of the votes cast, the Labor Commissioner shall conduct a runoff election.

(2) In the runoff election, the ballot shall contain the two choices receiving the highest number of votes cast in the initial election.

(e)(1) After the election, the Labor Commissioner shall certify the employee organization that received a majority of the votes cast as the exclusive representative.

(2) An employee organization may not be certified as an exclusive representative except as provided in this subtitle.