N.J. Stat. § 54:4-6.1
Whenever any public or quasi public agency or corporation of the Federal government shall have paid in any year or over a period of years, but a portion of the tax levied and assessed against it for municipal purposes, and the municipality wherein such property is located shall have paid in full its tax for State and county purposes for any or all of said years, the board of chosen freeholders is authorized and empowered by resolution to direct the county treasurer to allow to any such municipality, on application therefor, a credit or credits not to exceed fifty thousand dollars ($50,000.00) on account of future county taxes due from such municipality.
Whenever the board of chosen freeholders of any county shall direct the county treasurer to make and allow such credit or credits as in this act directed, the county treasurer is hereby authorized and empowered to make application to the State Treasurer for an allowance on the part of the State for all sums as aforesaid paid to the State on account of State taxes, and the State Treasurer shall allow to the county either a credit or credits or shall pay the amount aforesaid to such county on account of taxes heretofore paid as in this act authorized; provided, however, that the State Treasurer shall not be obligated in any case to pay or allow credit for any sum in excess of twenty-one thousand dollars ($21,000.00).
N.J.S. § 54:4-6.1