N.J. Stat. § 19:13-11
The officer with whom the original petition was filed shall in the first instance pass upon the validity of such objection in a summary way unless an order shall be made in the matter by a court of competent jurisdiction and for this purpose such officer shall have power to subpoena witnesses and take testimony or depositions. He shall file his determination in writing in his office on or before the ninth day after the last day for the filing of petitions, which determination shall be open for public inspection.
In the case of petitions nominating electors of candidates for President and Vice President of the United States, which candidates have not been nominated at a convention of a political party as defined by this Title, the Secretary of State shall file his or her determination in writing in his or her office on or before the 93rd day before the general election, which determination shall be open for public inspection.
N.J.S. § 19:13-11