Ohio Rev. Code § 917.15
As individuals or through one or more co-operative associations, producers supplying milk or cream to dealers in any market, may petition the director of agriculture to approve a plan of weighing, sampling, or testing milk or cream, or of auditing payments to producers and schedule of uses, or petition that such functions be performed more frequently than they are ordinarily performed by the director. When such a petition is filed, after public hearing held in the market by the director after two weeks' notice thereof in a newspaper of general circulation in the market, and after notice thereof has been mailed to all licensees who may be affected, if the director deems the market service requested to be advisable he may provide or authorize for the same in such manner as he finds advisable.
All such functions shall be financed by deduction from all producers who, as individuals or through an association, petition for them and whose milk or cream is delivered to the market area of the group affected, and only at such rate per one hundred pounds of milk or per pound of butterfat as will equal the actual cost of such work. Such deduction shall be made from each payment for milk or cream by the dealer receiving such milk or cream in such manner as the director prescribes and shall be paid to those performing such operations in such manner as the director prescribes.
The director may group separately producers and dealers receiving such producers' milk or cream by types of operation such as fluid milk operations, milk manufacturing operations, cheese making, and butter manufacturing. This section shall be applicable to each group separately in any market area.
The director shall discontinue any such special service upon petition of the majority of the producers affected, and he may discontinue such service upon his own initiative.
R.C. § 917.15