Ohio Rev. Code § 325.21
A board of county commissioners may authorize the county to join an association or non-profit organization formed for the improvement of county government. Such board shall have the authority to appropriate from its general fund an amount sufficient to pay the dues, subscription costs, or membership charges of such association or non-profit organization.
The board may also authorize any elected county official to join an association related to county affairs, at county expense. The board shall have the authority to appropriate an amount sufficient to pay the dues, subscription costs, and membership charges of such association. Before such expenses may be paid, the official's office shall make application to the board in writing showing the probable costs. If the board approves the application, such expenses shall be paid from moneys appropriated to such office. The amount appropriated for such expenses shall not exceed five cents per person for the county's population as determined by the latest federal census.
R.C. §325.21