New Jersey Statutes Title 48. Public Utilities 48 § 3-2.3

a. Notwithstanding the provisions of any law, rule, regulation, or order to the contrary, the board shall not allow a utility to assess a late payment charge on an unpaid bill unless the charge is provided for in the utility's applicable rate schedule approved by the board. A late payment charge shall not be approved by the board if the charge is applicable to bills less than 25 days after rendering. A late payment charge shall not be approved for a rate schedule applicable to a State, county or municipal government entity or any residential ratepayer.

As used in this subsection, a “utility” means a public utility, as public utility is defined in R.S.48:2-13 and including a natural gas pipeline utility as natural gas pipeline utility is defined in section 2 of P.L.1952, c. 166 (C.48:10-3), and a municipally-operated utility, insofar as the board's jurisdiction is extended to the municipally-operated utility under any applicable law.“Utility” shall not mean a local exchange telecommunications company or interexchange telecommunications carrier providing a competitive service as determined by the board pursuant to section 4 of P.L.1991, c. 428 (C.48:2-21.19).

b. The board may adopt, pursuant to the “Administrative Procedure Act,” P.L.1968, c. 410 (C.52:14B-1 et seq.), rules and regulations necessary to effectuate the purposes of subsection a. of this section.