4.—(1) The Authority shall appoint a clerk and a treasurer.
(2) The clerk and the treasurer shall hold and vacate office as such in accordance with the terms of the instruments by which they are respectively appointed and, notwithstanding the terms of the instrument of appointment, the Authority may terminate their appointment at any time.
(3) The offices of clerk and treasurer shall not be held by the same person or by persons who stand in relation to one another as partners or as employer and employee.
(4) For the period beginning with the appointed day until a clerk and treasurer have been appointed, the persons who are immediately before the appointed day clerk and treasurer of the existing board shall respectively be the clerk and the treasurer to the Authority.
(5) The Authority may appoint such other staff as may be required for the discharge of the functions of the Authority under this order.
(6) Where under an agreement with the Authority, any constituent local authority places its own staff at the disposal of the Authority, the Authority shall make annually such payments as may from time to time be agreed with that authority for the services of that staff.