N.J. Stat. § 43:10-18.64c
On or before the 30th day following the effective date of this act and on or before October 1, 1978 and by the same date in each subsequent year, the Director of the Division of Pensions of the State Department of Treasury shall review the index and determine the percentum of change in the index from the benefit year index pursuant to the provisions of the Pension Adjustment Act (P.L. 1969, c. 169, C. 43:3B-1 et seq.). The percentage of adjustment in the pensions shall be 3/5 of the percentum change. Any adjustment so calculated shall apply to all of the months of the following calendar year for eligible retirants and beneficiaries, except for those qualifying for the first time, it shall apply only to those months of the following calendar year in which the retirant or beneficiary is eligible to receive the adjustment.
The director shall certify the amounts sufficient to adjust the pensions payable to all eligible retirants and beneficiaries by 3/5 of the percentum of change in the index as such pensions may have been originally granted or increased for certain retirants in accordance with section 10 of P.L. 1966, c. 210 (C. 43:10-18.58b) or increased for certain beneficiaries in accordance with section 13 of P.L. 1948, c. 310 (C. 43:10-18.62). The director shall notify the secretary of the pension fund of the percentage of adjustment in the applicable year.
In no instance shall the amount of the pension originally granted and payable to any retirant be reduced as a result of this adjustment.
N.J.S. § 43:10-18.64c