9. Where the post of officer member is shared by two persons in pursuance of regulation 8—
(a)both persons shall be entitled to attend meetings of the Authority;
(b)one or other of those persons shall be eligible to vote in the case of agreement between them;
(c)in the case of disagreement between them no vote shall be cast by either of them;
(d)the presence of either or both of those persons shall count as one person for the purposes of paragraph 6.