20.—(1) A constituency or a regional returning officer at an Assembly election may, in writing, appoint one or more persons to discharge all or any of his functions.
(2) Paragraph (1) applies to a constituency returning officer at a constituency or a regional election.
(3) Except in the case of an election to fill a casual vacancy, it shall be the duty of each regional returning officer and each constituency returning officer for an Assembly constituency in the Assembly electoral region to co-operate with each other in the discharge of their functions.
(4) The duty imposed by paragraph (3) applies as between constituency returning officers in an Assembly electoral region as well as between such officers and the regional returning officer for the electoral region.
(5) In this Order, a reference to a constituency returning officer in relation to the discharge of functions at a regional election is a reference to the discharge of such functions in relation to the Assembly constituency for which he is the returning officer.