Ohio Rev. Code Ann. § 3307.354
The state teachers retirement board may establish a plan under which any contributions described in section 3307.352 of the Revised Code are invested at the direction of a superannuate or other system retirant in accordance with investment options established by the board. If the board establishes a plan, the state teachers retirement system shall transfer a superannuate's or other system retirant's contributions to the plan.