4.—(1) On the appointed day—
(a)the outgoing members shall cease to be members of the Port Authority; and
(b)the Port Authority shall under paragraph 3(1A) of Schedule 2 to the 1968 Act appoint three members (who may be the same persons as the outgoing members).
(2) Each of the persons, other than the outgoing members, who was a member immediately before the commencement of this Order shall (unless any such member resigns or vacates office) continue as a member until the expiry of the term for which he was appointed or, in the case of a member appointed under paragraph 6 of Schedule 2 to the 1968 Act, until he ceases to be an officer of the Port Authority or vacates office.