Ohio Const. art. II, § 1c

The second aforestated power reserved by the people is designated the referendum, and the signatures of six per centum of the electors shall be required upon a petition to order the submission to the electors of the state for their approval or rejection, of any law, section of any law or any item in any law appropriating money passed by the general assembly. No law passed by the general assembly shall go into effect until ninety days after it shall have been filed by the governor in the office of the secretary of state, except as herein provided. When a petition, signed by six per centum of the electors of the state and verified as herein provided, shall have been filed with the secretary of state within ninety days after any law shall have been filed by the governor in the office of the secretary of state, ordering that such law, section of such law or any item in such law appropriating money be submitted to the electors of the state for their approval or rejection, the secretary of state shall submit to the electors of the state for their approval or rejection such law, section or item, in the manner herein provided, at the next succeeding regular or general election in any year occurring subsequent to one hundred twenty-five days after the filing of such petition, and no such law, section or item shall go into effect until and unless approved by a majority of those voting upon the same. If, however, a referendum petition is filed against any such section or item, the remainder of the law shall not thereby be prevented or delayed from going into effect.