Md. Code, Land Use § 16–210

(a) A mediator may be used in the collective bargaining process whenever:

(1) the Commission and the employee organization agree to mediation; or

(2) an impasse results, and the Commission or the employee organization requests mediation.

(b) (1) The mediator shall be selected jointly by the Commission and the employee organization from a list supplied by the American Arbitration Association or the Federal Mediation and Conciliation Service.

(2) If the Commission and the employee organization are unable to agree on the selection of a mediator, the labor relations administrator shall select the mediator.

(c) The Commission and the employee organization shall share equally the costs of mediation.