Membership of any person shall cease:
(a) if, except as provided in N.J.S.18A:66-8, he shall discontinue his service for more than 10 consecutive years;
(b) upon the withdrawal by a member of his accumulated deductions as provided in this article;
(c) upon resignation and election to receive, in lieu of the return of his accumulated deductions, the benefits provided in N.J.S.18A:66-36 and N.J.S.18A:66-37;
(d) upon retirement;
(e) at death;
but not otherwise except as provided in this article.
The pension fund shall send written notice in care of the last employer of a member at least 60 days in advance of the date on which his inactive membership shall expire as provided in subsection (a) of this section.