Ohio Rev. Code § 513.18
In the event any township, contiguous to a joint township hospital district, desires to become a part of such district in existence under sections 513.07 to 513.18 of the Revised Code, its board of township trustees, by a two-thirds favorable vote of the members of such board, after the existing joint township hospital board has, by a majority favorable vote of the members thereof, approved the terms under which such township proposes to join the district, shall become a part of the joint township district hospital board under such terms and with all the rights, privileges, and responsibilities enjoyed by and extended to the existing members of the hospital board under such sections, including representation on the board of hospital governors by the appointment of an elector of such township as a member thereof.
If the terms under which such township proposes to join the hospital district involve a tax levy for the purpose of sharing the existing obligations, including bonded indebtedness, of the district or the necessary operating expenses of such hospital, such township shall not become a part of the district until its electors have approved such levy as provided in this section. In such a case, the board of township trustees and the county auditor shall proceed in the same manner as required for a tax levy under section 5705.03 of the Revised Code, except that the levy's annual collections shall be estimated assuming that the township has been added to the hospital district.
Upon request of the board of township trustees of the township proposing to join such district, by resolution approved by a two-thirds vote of its members, the board of elections of the county in which the township lies shall place upon the ballot for submission to the electorate of such township at the next primary or general election occurring not less than ninety nor more than one hundred thirty-five days after such request is received from the board of township trustees the question of levying a tax, not to exceed one mill outside the ten-mill limitation, for a period of not to exceed five years, to provide funds for the payment of the township's share of the necessary expenses incurred in the operation of such hospital, or the question of levying a tax to pay the township's share of the existing obligations, including bonded indebtedness, of the district, or both questions may be submitted at the same primary or general election. The question appearing on the ballot shall read:
"Shall _____ (name of township) be added to the _____ (name of joint township hospital district), and property tax be levied for the purpose of _____ (purpose of tax), that the county auditor estimates will collect $______ annually, at a rate not exceeding _____ mills for each $1 of taxable value, which amounts to $_____ (rate or estimated effective rate, as applicable) for each $100,000 of the county auditor's appraised value, to be in effect for _____ (number of years the tax is to be in effect)?"
If a majority of the electors voting on the propositions vote in favor thereof, the county auditor shall place such levies on the tax duplicate against the property in the township, which township shall thereby become a part of said joint township hospital district.
As used in this section, "the county auditor's appraised value" and "estimated effective rate" have the same meanings as in section 5705.01 of the Revised Code.
R.C. § 513.18