Ohio Rev. Code § 6117.28
Whenever the owners of all the lots and lands to be assessed for any sanitary or drainage facility improvement or any prevention or replacement facility improvement provided for in this chapter, by petition in writing, request the board of county commissioners to provide for the acquisition or construction, maintenance, and operation of the improvement, describing the improvement and the lots and lands owned by them respectively to be assessed to pay the cost of acquisition or construction, maintenance, and operation of the improvement and consenting that their lots and lands may be assessed to pay the cost of the acquisition or construction of the improvement and of its maintenance and operation as provided in this chapter, and waive all legal notices otherwise required, the board may have the county sanitary engineer prepare, or otherwise cause to be prepared, the necessary plans, specifications, and estimate of cost of the acquisition or construction, maintenance, and operation of the improvement and a tentative assessment. When the owners state, in writing, that they have examined the estimate of cost and tentative assessment, that they have no objections to them, and that, in case bonds are proposed to be issued prior to the acquisition or construction of the improvement, they waive their right or option to pay the assessments in cash, the board may proceed as provided in this chapter to cause the improvement to be acquired or constructed and to cause provision to be made for the payment of the cost of its acquisition or construction, maintenance, and operation, except that none of the notices otherwise required by law need be given and no opportunity need be provided for the filing of objections to the improvement, its character and termini, the boundaries of the assessment district, or the tentative assessment or, if bonds are issued prior to the acquisition or construction of the improvement, for paying the assessments in cash. The board may proceed to issue or incur public obligations in the required amount, complete the acquisition or construction of the improvement, and levy and collect the assessments authorized by this chapter. No person or public agency shall have the right to appeal from any decision or action of the board in the matter except refusal by the board to proceed with the improvement.
The tentative assessment provided for in this section shall be for the information of property owners and shall not be levied or certified to the county auditor for collection. On completion of the improvement, its cost shall be determined, and the county sanitary engineer shall prepare, or otherwise cause to be prepared, a revised assessment based on the actual cost and in substantially the same proportion as the tentative assessment. The board shall confirm and levy the revised assessment and certify it to the county auditor for collection.
R.C. § 6117.28