Mich. Comp. Laws § 123.643

Sec. 3. For the purpose of providing funds to meet the expenses of the supervisors' intercounty committee, the member county boards of supervisors, by resolution, may authorize the allocation of county funds for such purpose. The proportion of the total amount of funds to be provided by each member-county shall be based on the recommendation of the supervisors' intercounty committee, or shall be provided for in the bylaws of the committee, which shall have been approved by the member county boards of supervisors.