New Jersey Legislature, New Jersey Pamphlet Laws of 1971… (1971)
“ Enter and inspect any building or place, except private residences, for the purpose of investigating an actual or suspected source of air pollution and ascertaining compliance or noncompliance with any code, rules and regulations of the department. Any information relating to secret processes or methods of manufacture or production obtained in the course of such inspection, investigation or determination, shall be kept confidential and shall not be admissible in evidence in any court or in any other proceeding except before the department as herein defined. ”
