The Executive Director is the chief administrative officer of the Authority. With the approval of the Secretary, the Authority may: appoint the Executive Director; or contract with a private entity to perform the duties of the Executive Director. The Executive Director serves at the pleasure of the Authority, with the concurrence of the Secretary. In addition to any other duties set forth in this subtitle, the Executive Director shall: supervise the administrative affairs and technical activities of the Authority in accordance with its regulations and policies; attend all meetings of the Authority; keep minutes of all proceedings of the Authority; approve all accounts for salaries, per diem payments, and allowable expenses of the Authority, its employees, and its consultants; approve all expenses incidental to the operation of the Authority; and perform any other duty that the Authority or the Secretary requires to carry out this subtitle.