Ohio Rev. Code § 731.29
Any ordinance or other measure passed by the legislative authority of a municipal corporation shall be subject to the referendum except as provided by section 731.30 of the Revised Code. No ordinance or other measure shall go into effect until thirty days after it is filed with the mayor of a city or passed by the legislative authority in a village, except as provided by such section.
When a petition, signed by ten per cent of the number of electors who voted for governor at the most recent general election for the office of governor in the municipal corporation, is filed with the city auditor or village clerk within thirty days after any ordinance or other measure is filed with the mayor or passed by the legislative authority of a village, or in case the mayor has vetoed the ordinance or any measure and returned it to council, such petition may be filed within thirty days after the council has passed the ordinance or measure over the veto, ordering that such ordinance or measure be submitted to the electors of such municipal corporation for their approval or rejection, such auditor or clerk shall, after ten days, and not later than four p.m. of the ninetieth day before the day of election, transmit a certified copy of the text of the ordinance or measure to the board of elections. The auditor or clerk shall transmit the petition to the board together with the certified copy of the ordinance or measure. The board shall examine all signatures on the petition to determine the number of electors of the municipal corporation who signed the petition. The board shall return the petition to the auditor or clerk within ten days after receiving it, together with a statement attesting to the number of such electors who signed the petition. The board shall submit the ordinance or measure to the electors of the municipal corporation, for their approval or rejection, at the next general election occurring subsequent to ninety days after the auditor or clerk certifies the sufficiency and validity of the petition to the board of elections.
No such ordinance or measure shall go into effect until approved by the majority of those voting upon it. Sections 731.28 to 731.41 of the Revised Code do not prevent a municipal corporation, after the passage of any ordinance or other measure, from proceeding at once to give any notice or make any publication required by such ordinance or other measure.
As used in this section, "certified copy" means a copy containing a written statement attesting that it is a true and exact reproduction of the original ordinance or other measure.
R.C. § 731.29