N.J. Stat. § 40A:4-33
The anticipated revenues from the operation of any utility or enterprise owned or operated by a local unit and the appropriations to be made therefor shall be set forth in a separate section of the budget.
Dedicated revenues, derived from publicly owned or operated utilities or enterprises, shall not be stated in the budget in an amount which is in excess of the appropriation therein to the purposes to which the same are applicable, or in excess of the amount actually realized in cash from the same source during the preceding fiscal year, unless the director shall, upon application of the governing body, determine that the facts clearly warrant the expectation that such excess amount will actually be realized in cash during the fiscal year and shall certify such determination in writing to the local unit.
N.J.S. § 40A:4-33