N.J. Stat. § 43:13-22.73
On or before October 1, 1996 and by the same date in each subsequent year, the Director of the Division of Pensions and Benefits of the Department of the Treasury shall review the index and determine the percentum of change in the index from the retirement year index pursuant to the provisions of the "Pension Adjustment Act," P.L. 1958, c.143 (C.43:3B-1 et seq.). The percentage of adjustment in the retirement allowances, pensions and survivorship benefits shall be one-half of the percentum of change in the index. Any adjustment so calculated shall apply to all of the months of the following calendar year for eligible retirants and beneficiaries, except that 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.
On the basis of information certified to the director by the retirement system concerning the amounts of all retirement allowances, pensions and survivorship benefits of eligible retirants and beneficiaries which are subject to adjustment under sections 7 through 13 of P.L. 1990, c.20 (C.43:13-22.69 through 22.75), and any other relevant matters as the director may require, the director shall certify to the retirement system the amounts required to fund the benefits provided under those sections for the applicable year. The director shall include in that certification amounts sufficient to adjust the retirement allowances, pensions or survivorship benefits payable to all eligible retirants and beneficiaries by the percentum of change in the index as such retirement allowances or pensions may have been originally granted, or increased for certain retirants and beneficiaries in accordance with the provisions of the "Pension Adjustment Act."
In no instance shall the amount of the retirement allowance, pension or survivorship benefit originally granted and payable to any retirant or beneficiary be reduced as a result of this adjustment.
N.J.S. § 43:13-22.73