N.J. Stat. § 43:16A-48.6
The actuary of the Police and Firemen's Retirement System shall calculate the liability of each employer of employees becoming members of the system under this act in the same manner as is specified in the case of other employees where the Police and Firemen's Retirement System is adopted, taking into account the value of moneys remitted by the pension funds. In the event that the value of such money so remitted is less than the total which is required by the Police and Firemen's Retirement System to provide the transferred member with credit for his public service, the liability of the employer shall include an amount equal to the difference between these two values. Upon certification by the actuary of the Police and Firemen's Retirement System each employer shall make such contributions as are required in order to meet his financial obligations in the same manner and within the same period of time as is specified in the case of other employers where the Police and Firemen's Retirement System of New Jersey is adopted.
N.J.S. § 43:16A-48.6