Ohio Rev. Code § 153.501: Subcontracts awarded by construction manager at risk, design-build firm, or general contracting firm; utilization of design-assist firm; self-performed portions of work.

(A) A public authority may accept a subcontract awarded by a construction manager at risk, a design-build firm, or a general contracting firm, or may reject any such subcontract if the public authority determines that the bidder is not responsible.

(B) A public authority may authorize a construction manager at risk or design-build firm to utilize a design-assist firm on any public improvement project without transferring any design liability to the design-assist firm.

(C) If the construction manager at risk or design-build firm intends and is permitted by the public authority to self-perform a portion of the work to be performed, the construction manager at risk or design-build firm shall submit a sealed bid to the public authority for the portion of the work prior to accepting and opening any bids for the same work, except when the public authority requests a guaranteed maximum price proposal due at the time of selection.