Paragraph 3 Cessation of membership
A person is to be treated as having ceased to be a member of a political group when—
(a)
he has ceased to be a member of the local authority;
(b)
he has notified the proper officer in writing that he no longer wishes to be treated as a member of the group;
(c)
there is delivered to the proper officer a notice under paragraph 1 or 2(b) signed by the person whereby a new political group is constituted or he joins another political group; or
(d)
there is delivered to the proper officer a notice in writing signed by the majority of the members of the group stating that they no longer wish him to be treated as a member of it.