Ohio Revised Code Title LVII. Taxation § 5727.48

The tax commissioner, on application by a public utility, may extend to the public utility a further specified time, not to exceed thirty days, within which to file any report or statement required by this chapter to be filed with the commissioner, except reports required by sections 5727.24 to 5727.29 of the Revised Code. A public utility must file such an application, in writing, with the commissioner on or before the date that the report or statement is otherwise required to be filed.