N.J. Stat. § 52:15-4
Whenever the functions, powers, and duties and emoluments of the office of Governor shall devolve upon the President of the Senate, the Speaker of the House of Assembly or any other person, in accordance with Article V, Section I, or Article IV, Section VI, paragraph 4 of the Constitution of this State, or laws adopted pursuant thereto, he shall, before assuming the duties of such office, take and subscribe the following oath to wit: "I,, President of the Senate (or Speaker of the House of Assembly, or as the case may be), upon whom has devolved the functions, powers, duties and emoluments of the office of Governor of the State of New Jersey, do solemnly promise and swear, that I will diligently, faithfully and to the best of my knowledge, administer the Government of the State in conformity with the powers delegated to me; and that I will, to the utmost of my skill and ability, promote the peace and prosperity and maintain the lawful rights of the State. So help me God."
N.J.S. § 52:15-4