Ohio Revised Code Title XXXVII. Health Safety Morals § 3797.03

(A) A registrant who establishes a new residence or place of employment within a county in which the registrant is registered shall promptly send the sheriff written notice of the address of the new residence or place of employment.

(B) A registrant who intends to reside in a county other than the one in which the registrant has registered a residence address shall send the sheriff of the county in which the registrant intends to reside written notice of the registrant's intent to reside in that county. The registrant shall send the notice at least twenty days before the date the registrant begins to reside in the county. The notice shall include the registrant's name and the address or addresses at which the registrant intends to reside. If the change of address is not to a fixed address, the registrant shall include in the notice a detailed description of the place or places at which the registrant intends to stay and, not later than the end of the first business day immediately following the day on which the registrant obtains a fixed residence address, shall provide the sheriff written notice of the fixed residence address. If a registrant whose residence address change is not to a fixed address describes in a notice under this division the place or places at which the registrant intends to stay, the place or places so described in the notice shall be considered the registrant's residence address until the registrant provides the written notice of a fixed residence address as described in this division.