Confidentiality of Library Users’ Records in the New Jersey State Statutes

18A:73-43.2. Confidentiality; exceptions
Library records which contain the names or other personally identifying details regarding the users of libraries are confidential and shall not be disclosed except in the following circumstances:
a.   The records are necessary for the proper operation of the library;
b.   Disclosure is requested by the user; or
c.   Disclosure is required pursuant to a subpoena issued by a court or court order.
L. 1985, c. 172, s. 2, eff. May 31, 1985.

http://www.njleg.state.nj.us/