Ohio Rev. Code Ann. § 125.02
(A) The department of administrative services shall establish contracts for supplies and services, including telephone, other telecommunications, and computer services, for the use of state agencies, and may establish such contracts for the use of any political subdivision as described in division (B) of section 125.04 of the Revised Code, except for the following:
(E) The director may enter into cooperative purchasing agreements to purchase supplies or services with the following: