The New Jersey Constitution of 1947 (Annotated) Art. XI, § IV, ¶ 14

14. The Judicial Article of this Constitution shall take effect on the fifteenth day of September, one thousand nine hundred and forty-eight, except that the Governor, with the advice and consent of the Senate, shall have the power to fill vacancies arising prior thereto in the new Supreme Court and the Superior Court;  and except further that any provision of this Constitution which may require any act to be done prior thereto or in preparation therefor shall take effect immediately upon the adoption of this Constitution.

Done in Convention, at Rutgers University, the State University of New Jersey, in New Brunswick, on the tenth day of September, in the year of our Lord one thousand nine hundred and forty-seven, and of the independence of the United States of America the one hundred and seventy-second.