New Jersey Statutes Title 19. Elections 19 § 7-5

Such challengers shall be the authorized challengers for their respective political parties and candidates or for the proponents or opponents of a public question. They shall have the power to challenge the right to vote therein of any person claiming such right and shall have power to ask all necessary questions to determine this right. They may be present while the votes cast at any election are being counted, hear and see the ballots counted and shall have the right and power to challenge the counting or rejecting of any ballot or any part of a ballot.They shall be entitled to ask the members of the district boards of election at each polling place, no more than every two hours, for the official count of how many voters have voted at each precinct, and the district boards of election shall provide this information as the notice required pursuant to section 1 of P.L.2018, c. 110 (C.19:52-3.1).