New Jersey Statutes Title 40. Municipalities and Counties 40 § 37-261

The board of chosen freeholders of any county having control of a public park or public recreation place which is governed by the provisions of article 6 of chapter 37 of Title 40 of the Revised Statutes, may appoint and establish a constabulary to preserve order in the parks and parkways under its control, and to secure the enforcement of the rules and regulations adopted by it, and may organize the constabulary into a police system to be known as “the park police of the county of ․․․․․․․․․․․․․․․․․․.”

The police system shall consist of a chief and such subordinate officers as may be deemed necessary and proper for the enforcement of the rules and regulations of the board of freeholders within the parks and parkways, and the proper protection of public property therein.

The board of freeholders may establish proper rules and regulations for the appointment, control and management of the members of the constabulary, and for the securing of proper discipline and efficiency among the members thereof.