Md. Code, Land Use § 15-106

(a) The County Executive of Prince George’s County, with the approval of a majority of the members of the County Council, and the Montgomery County Council, with the approval of the County Executive in accordance with subsection (b) of this section, shall each designate a commissioner for the position of chair or vice chair. (b) (1) Within 3 days after making a designation, the Montgomery County Council shall submit the name of the designee to the County Executive. (2) Within 30 days after the designation is submitted, the County Executive shall approve or disapprove the designation. (3) If the County Executive disapproves a designee, the County Executive shall return the name of the designee to the County Council with the reasons for the disapproval stated in writing. (4) By the affirmative vote of eight of its members, the County Council may designate a commissioner for the position of chair or vice chair over the disapproval of the County Executive. (5) A designation that has not been disapproved by the County Executive in accordance with this subsection is deemed to be approved. (c) The Commission shall elect a chair and vice chair from the commissioners designated in accordance with subsections (a) and (b) of this section. (d) (1) The chair shall: (i) preside at meetings of the Commission; and (ii) perform the other customary duties of the office. (2) The vice chair shall preside in the absence of the chair. (3) The chair and vice chair of the Commission also serve as chairs of their respective county planning boards.