N.J. Stat. § 48:19-8
Any company, however incorporated, which on March twenty-second, one thousand nine hundred and thirty-four, was actually engaged in supplying one or more municipalities with water for public and private use, and which has filed in the office of the secretary of state a certificate approved by the board of public utility commissioners purporting to be under the act entitled "A supplement to an act entitled "An act for the construction, maintenance and operation of waterworks for the purpose of supplying cities, towns, townships, villages, boroughs and other municipalities in this state with water, and otherwise amending said act,' approved April twenty-first, one thousand eight hundred and seventy-six, as such title was amended by an act approved June twenty-second, one thousand nine hundred and six," approved April tenth, one thousand nine hundred and thirty-three (L.1933, c. 98, p. 202), shall be deemed to have become thereby duly incorporated and to be fully authorized to continue to supply water for public and private use in any and all municipalities then being supplied by such company, and said company shall be fully authorized to exercise all the rights and powers conferred by this chapter and may thereafter continue to maintain, operate and extend its works, mains, pipes and appurtenances in each of the municipalities being supplied.
N.J.S. § 48:19-8