Ohio Rev. Code Ann. § 4123.29
(A) The administrator of workers' compensation, subject to the approval of the bureau of workers' compensation board of directors, shall do all of the following:
(2)
(4)
(a) Offer to insure the obligations of employers under this chapter under a plan that groups, for rating purposes, employers, and pools the risk of the employers within the group provided that the employers meet all of the following conditions:
(B) The administrator, with the advice and consent of the board, by rule, may do both of the following: