4.—(1) Subject to the following provisions of this paragraph, a member of the Board shall hold and vacate his office in accordance with the terms of his appointment.N.I.
(2) A member of the Board may at any time by notice in writing to the Head of the Department resign his office.
(3) The Head of the Department may at any time by notice in writing to a member of the Board remove him from office.
(4) Where a member becomes or ceases to be the chairman or a deputy chairman of the Board, the Head of the Department may vary the terms of his appointment.
(5) A person shall, on ceasing to hold office as a member of the Board, be eligible for re‐appointment.