Ind. Code § 3-11-14-21

Sec. 21. After the opening of the polls, the inspector, judges, and poll clerks may not allow any person to pass within the railing to the part of the room where an electronic voting system is situated, except for the purpose of voting. Except as provided in IC 3-11-9, they may not permit more than one (1) voter at a time to be in the part of the room where an electronic voting system is situated.