N.J. Stat. Ann. § 43:10-103

In case, at any time there shall not be sufficient money in such pension fund to pay such pensions, the board of chosen freeholders of the county shall, from time to time, include in any tax levy, a sum sufficient to meet the requirements of such pension fund. Whenever such pension fund shall exceed an amount which the board of chosen freeholders of such county shall by resolution from time to time determine to be adequate for such pension fund, no moneys except the three per centum (3%) specified in this act, and the moneys given or donated as herein mentioned and any aforementioned rewards shall be paid into such fund, unless and until the amount of such fund shall fall below the amount thus determined to be adequate.