N.J. Stat. § 18A:54-29.3
The board of chosen freeholders of any county of the second class having a population of not less than 375,000 nor more than 425,000 inhabitants and which has created a county vocational school district subsequent to July 1, 1962, may provide that the amounts (other than amounts to be raised for interest and redemption of bonds or notes issued by the county for purposes of such county vocational school district) to be raised for annual or special appropriations for such county vocational school district are to be apportioned on the basis of (1) the apportionment valuations, as defined in section 54:4-49 of the Revised Statutes, of the municipalities in such county, or (2) the average daily enrollment of pupils from municipalities within such county during the preceding school year, or (3) any combination or percentage of either of the aforesaid, as shall be determined by said board of chosen freeholders prior to October 1 for and with respect to the school year commencing on July 1 next succeeding said date. Determination as to any basis as aforesaid shall be made by resolution of such board of chosen freeholders, if such board, after consideration of the vocational school needs of such county and of the municipalities therein and of the costs and expenses of such county vocational school district and of the financial resources and abilities of such county and of the municipalities therein, shall find that such basis is in the best interests of the county and of such county vocational school district and the municipalities therein. Any basis so established shall continue without change for a period of five school years, unless prior to the end of such period the commissioner, upon the request of the board of chosen freeholders or of the board of education of the county vocational school district, shall determine that some other or different basis, as herein permitted or provided for, shall be in the best interest of such county, such county vocational school district and the municipalities therein, and is a basis which could have been established by the board of chosen freeholders of such county. Until any other basis shall have been established, the basis referred to as above shall be applicable to such county vocational school district. Where average daily enrollment of the preceding school year is to be used as the whole or any part of a basis for apportionment of amounts to be raised for annual or special appropriations, the commissioner shall certify to the county vocational school district and to the county board of taxation, from the latest official statistics then available or estimates thereof, the average daily enrollment to be used until such time as actual average daily enrollment statistics shall be available and certified by the commissioner as aforesaid. No amount to be raised for annual or special appropriations for the county vocational school district shall be so appropriated except with the concurrence and consent of the board of chosen freeholders if the basis for raising such annual or special appropriations of the county vocational school district shall require that more than 50% of such basis shall be such apportionment valuations.
N.J.S. § 18A:54-29.3