Ind. Code § 36-10-3-41
The bonds may not be issued until they have been approved by the county council. After the county council has approved the issuance of the bonds, the county council may not reduce the innkeeper's tax rate below a rate that would produce one and twenty-five hundredths (1.25) times the highest annual debt service on the bonds to their final maturity, based on an average of the immediately preceding three (3) years tax collections, if the tax has been levied for the last preceding three (3) years. If the tax has not been levied for the last preceding three (3) years, the county council may not reduce the rate below a rate which would produce one and twenty-five hundredths (1.25) times the highest debt service, based upon a study by a qualified public accountant or financial advisor.
IC 36-10-3-41