N.J. Stat. § 45:14D-19
If a person who refuses to testify or produce any book, paper, or other document in any proceeding under P.L. 1981, c. 311 (C. 45:14D-1 et seq.) for the reason that the testimony or evidence, documentary or otherwise, required of him may tend to incriminate him, or convict him of a crime, is directed to testify or to produce the book, paper, or document by the Attorney General, he shall comply with the direction.
A person who is entitled by law to, and does assert a privilege, and who complies with the direction of the Attorney General, shall not thereafter be prosecuted or subject to any penalty or forfeiture in any criminal proceeding which arises out of and relates to the subject matter of the proceeding. No person so testifying shall be exempt from prosecution or punishment for perjury or false swearing committed by him in giving the testimony or from any civil or administrative action arising from the testimony.
N.J.S. § 45:14D-19