A plan may, but need not, provide that, upon termination of employment of an employee for any cause specified in such plan, other than retirement pursuant to such plan, or upon the death of such employee prior to retirement, all or part of the contribution made by the bank on behalf of such employee, shall be paid, in the manner provided by such plan, to such employee, or to a beneficiary or beneficiaries designated by him.
N.J.S. § 17:9A-27.11