N.J. Stat. § 53:2-1
The members of the State Police shall be subject to the call of the Governor. They shall be peace officers of the State, shall primarily be employed in furnishing adequate police protection to the inhabitants of rural sections, shall give first aid to the injured and succor the helpless, and shall have in general the same powers and authority as are conferred by law upon police officers and constables.
They shall have power to prevent crime, to pursue and apprehend offenders and to obtain legal evidence necessary to insure the conviction of such offenders in the courts. They shall have power to execute any lawful warrant or order of arrest issued against any person, and to make arrests without warrant for violations of the law committed in their presence, and for felonies committed the same as are or may be authorized by law for other peace officers.
They may co-operate with any other State department, or any State or local authority in detecting crime, apprehending criminals and preserving law and order; but the State Police shall not be used as a posse in any municipality except upon order of the Governor when requested by the governing body of such municipality; provided, however, that the Superintendent of State Police, or the person in charge thereof, shall, upon request made to him by the superintendent of elections of any county of this State, assign for use on any election day officers and troopers, not to exceed fifteen in number in any one county, to aid such superintendents of elections in the enforcement of the election laws of this State.
They may act as inspectors of motor vehicles and as wardens in the protection of the forests, and the fish and game of the State. With respect to enforcement of the provisions of the "New Jersey Alcoholic Beverage Control Act," Title 33 of the Revised Statutes, they shall have all the powers conferred upon "officers" pursuant to that title. They shall have the authority to investigate any offenses or violations occurring on the waters of this State, as defined in section 1 of P.L. 1986, c.150 (C.53:1-11.10), and to stop and board a vessel in the waters of the State to determine whether the vessel complies with State and federal boating safety laws and shall have the power to order a vessel that does not comply with these laws to return immediately to shore. They shall have the authority, in accordance with applicable State and federal laws, rules and regulations, to take appropriate action as authorized by the United States Coast Guard to assist the United States Coast Guard in the enforcement of any safety and security zone established by the United States Coast Guard Captain of the Port for the Port of New York and New Jersey or the Port of Philadelphia. They shall have the authority to perform all of the duties of members of the State Capitol Police Force as defined in section 2 of P.L. 1977, c.135 (C.52:17B-9.2).
N.J.S. § 53:2-1