N.J. Stat. § 43:15A-161
The State shall be liable for any increased pension costs to a county as a result of the enrollment of prosecutors, first assistant prosecutors and assistant prosecutors in the Prosecutors Part, established pursuant to P.L. 2001, c. 366(C.43:15A-155 et seq.), of the Public Employees' Retirement System, established pursuant to P.L. 1954, c.84 (C.43:15A-1 et seq.). The actuary for the Public Employees' Retirement System shall determine the unfunded accrued liability for the Prosecutors Part of the retirement system and the benefits provided for prosecutors under that part in the same manner provided for the determination of the unfunded accrued liability of the retirement system by section 24 of P.L. 1954, c.84 (C.43:15A-24). This unfunded accrued liability shall be amortized in the manner provided by section 24 over an amortization period of 30 years.
N.J.S. § 43:15A-161