Ohio Rev. Code § 3505.16: Ballot boxes and supplies placement at polling place.

Before the opening of the polls, the package of supplies and the ballot box shall be opened in the presence of the precinct officials. The ballot box, the package of ballots, registration forms, and other supplies shall at all times be in full sight of the observers, and no ballot box or unused ballots during the balloting or counting shall be removed or screened from their full sight until the counting has been closed and the final returns completed and the certificate signed by the judges.