Placement of Precinct Tabulator. The precinct tabulator shall be placed so that the process of depositing ballots can be conveniently observed by the: Voter offering a ballot; Election judges; and Challengers and watchers. Constant Attendance Required. From the time the polls are opened until the ballots are returned to the counting center, the precinct tabulator shall be attended by at least one election judge. Election Judges’ Duties. From the time the polls are opened until voting ends, the election judges attending the precinct tabulator shall make certain that: Only valid voted ballots are deposited in the precinct tabulator; Nothing is removed from the precinct tabulator without authorization by a chief judge; and The secrecy of each voter’s ballot is preserved.