In addition to those powers and duties prescribed in Section 604, the general manager of the Department of Airports shall have the power and duty to:
(a) enforce all orders, rules and regulations adopted by the board;
(b) supervise and manage the design, construction, maintenance and operation of all work or improvements authorized or ordered by the board;
(c) designate and assign space for the use of aircraft at the established rates or charges and subject to the rules and regulations of the department;
(d) designate and assign space in any warehouse, shop, field, runway, hangar or like facility at the established rates or charges and subject to the rules and regulations of the department;
(e) revoke any assignment made under subsection (c) or (d) of this section, in accordance with Section 634(b); and
(f) carry out all powers and duties of the department delegated by the board.