A member under 65 years of age upon retirement for accidental disability shall receive a retirement allowance which shall consist of:
Upon the receipt of proper proofs of the death of a member who has retired on an accidental disability retirement allowance, there shall be paid to such member's beneficiary, an amount equal to 1 1/2 times the compensation upon which contributions by the member to the annuity savings fund were based in the last year of creditable service or in the year of the member's highest contractual salary, whichever is higher; provided, however, that if such death shall occur after the member shall have attained age 60, the amount payable shall equal 3/16 of such compensation. The death benefits provided in this section shall apply to any member who has retired or shall retire on or after January 1, 1956.
N.J.S. § 18A:66-42