New Jersey Statutes Title 48. Public Utilities 48 § 3-123

c. (1) Following the effective date of P.L.2023, c. 293 (C.48:3-122 et seq.)  1 and in accordance with federal law, if applicable, an entity that installs a new line, which line is attached to a building or structure and owned by the entity, shall mark the end of the line attached to the building or structure with the initials of the entity's name, abbreviation of the entity's name, corporate symbol, or other distinguishing mark or code by which ownership may be readily and definitely ascertained.

(2) When an entity owns or maintains a line that is attached to a building or structure, which line was installed before the effective date of P.L.2023, c. 293 (C.48:3-122 et seq.), and the entity discovers that the line does not contain the markings specified in paragraph (1) of this subsection, the entity shall mark the end of the line attached to the building or structure with the initials of the entity's name, abbreviation of the entity's name, corporate symbol, or other distinguishing mark or code by which ownership may be readily and definitely ascertained. Nothing in this subsection shall be construed to require an entity to affirmatively search for any unmarked lines.