4.—(1) Subject to regulation 6, the Returning Officer must assign an Assistant Returning Officer to each overseas polling station.
(2) If at any time the Assistant Returning Officer for an overseas polling station becomes unable to act, he or she must —
(a)
notify the Returning Officer without delay; and
(b)
appoint a presiding officer for that overseas polling station to act for him or her until an assignment is made under paragraph (3) or until he or she is again able to act.
(3) After being notified under paragraph (2)(a), the Returning Officer must assign another Assistant Returning Officer to that overseas polling station.
(4) A reference to an Assistant Returning Officer in this Part includes a reference to a presiding officer appointed under paragraph (2)(b) to act for an Assistant Returning Officer.