In case of a union for cemetery purposes between a municipal corporation and a township as provided by section 759.27 of the Revised Code, the legislative authority of the municipal corporation and the board of township trustees shall have a joint meeting at the council-chamber of the municipal corporation, on the day of the first regular meeting of the legislative authority in the month of May each year, for the purpose of determining the rate of tax to be levied upon the taxable property of the municipal corporation and the township for such purposes. Upon the passage of a joint resolution by a majority of the members of the legislative authority and the board of township trustees, fixing the rate of taxation, the clerk of the municipal corporation shall certify such rate to the county auditor for assessment and collection. If there is more than one municipal corporation or township united for such purposes, the legislative authorities and boards shall become such joint body with the same powers as if there has been one municipal corporation and one township, and the clerk of the municipal corporation containing the greatest number of inhabitants shall certify to the auditor as provided by this section, the rate of taxation.