Md. Code, Environment § 5–1204

(a) The chairman of the Commission shall be selected from the members of the county and city by a majority vote of the entire Commission.

(b) (1) The members shall meet at the chairman’s request at least annually or any time at the request of a quorum of members of the county or city.

(2) A quorum consists of 5 members.

(3) A majority vote of the full Commission is necessary to approve any action.