An ordinance establishing a board or commission shall specify the following:
(a) The number of members comprising such commission of board; and
(b) Their term of office; and
(c) The powers and duties assigned to the board or commission; and
(d) The conditions under which vacancies in membership shall occur automatically; and
(e) The qualifications for appointment to such board or commission; and
(f) Such other matters as may be necessary, in the judgment of the Council, to enable the commission to perform its assigned functions.