N.J. Stat. § 19:14-29
When a copy of an act of the legislature is required by section 19:14-27 of this title to be printed and mailed to each registered voter, and such act is an amendment or supplement to a statute of this state, there shall be printed and mailed to each registered voter as hereinbefore provided, in addition to the copy of the act submitted, such portion of the statute to which the same is an amendment or supplement as shall be necessary clearly to disclose to the voter the relation of the act submitted to the existing statute law.
When a copy of a constitutional amendment is required by said section 19:14-27 to be printed and mailed, then in addition to the copy of the constitutional amendments submitted, there shall be printed and mailed to each registered voter as hereinbefore provided, such portion of the constitution as shall be necessary clearly to disclose to the voter the relation of the amendment submitted to the existing constitution.
N.J.S. § 19:14-29