N.J. Stat. Ann. § 43:10-18.51

In each county of this State having a population of from three hundred thousand to three hundred twenty-five thousand inhabitants a county employees' pension fund shall be created, set apart, maintained and administered, in the manner prescribed in this act, for the benefit of employees of such county and of the widows, widowers, and children of such employees, and of all contributors to, participants in, and beneficiaries of any pension fund in operation in such county at the time this act shall come in force and effect in such county, under and by virtue of articles one, two, five, six and nine of chapter ten and chapter nine of Title 43 of the Revised Statutes and of sections 40:37-157 to 40:37-174, inclusive, of the Revised Statutes and of "An act providing for the retirement of persons employed in the department of weights and measures of any county in this State, and providing a pension for such persons so retired," filed June twenty-first, one thousand nine hundred and thirty-eight (P.L.1938, c. 397).