Revocation of nomination
7.  Any nomination made by a member shall be revoked —
(a)in accordance with section 25(5)(a) of the Act, by his marriage, whether the marriage was contracted before, on or after 15th May 1980;
(b)by the death, in his lifetime, of the nominee or, where there is more than one nominee, of all the nominees;
(c)by written notice of revocation given by him in accordance with these Rules; or
(d)by a subsequent nomination duly made by him in accordance with these Rules.