N.J. Stat. § 2A:15-18: Action by taxpayer on failure of county or municipality to sue

If the board of chosen freeholders of a county or the governing body of a municipality fails to prosecute a claim or demand of the county or municipality, any court in which an action on such claim or demand is cognizable may, upon terms, allow a taxpayer and resident of the county or municipality to commence and prosecute an action upon the claim or demand in the name and on behalf of the county or municipality, if in the opinion of the court the interests of the county or municipality would be promoted thereby.

L.1951 (1st SS), c.344.