New Jersey Statutes Title 40A. Municipalities and Counties 40A § 14-107

(1) All rules and regulations made and promulgated by the governing body of the county governing the use of by the public, and the welfare of the public on, county highways and roads;

(2) All provisions of chapter 171 (Sunday observances) of Title 2A of the New Jersey Statutes;

(3) All provisions of Title 39 (Motor Vehicles and Traffic Regulation) of the Revised Statutes;

(4) All provisions of Title 2C of the New Jersey Statutes; and

(5) All rules and regulations made and promulgated by the governing body of the county respecting the general health, safety and welfare of the public within the territorial limits of the county.

The said members and officers have authority to arrest for the commission of any crime anywhere in the county of their appointment; they shall also have full authority to arrest for any crimes committed in their presence which are committed anywhere within the territorial limits of the State of New Jersey.