Ohio Revised Code Title XXXIII. Education Libraries § 3313.5320

(A) Each school that participates in athletic competitions or events administered by an organization that regulates interscholastic athletic conferences or events shall designate interscholastic athletic teams based on the sex of the participants as follows:

(B) No school, interscholastic conference, or organization that regulates interscholastic athletics shall knowingly permit individuals of the male sex to participate on athletic teams or in athletic competitions designated only for participants of the female sex.

(C) Nothing in this section shall be construed to restrict the eligibility of any student to participate on any athletic teams or in athletic competitions that are designated as male or co-ed.

(D) No agency or political subdivision of the state and no accrediting organization or athletic association that operates or has business activities in this state shall process a complaint, begin an investigation, or take any other adverse action against a school or school district for maintaining separate single-sex interscholastic athletic teams or sports.

(F) Any civil action brought as a result of a violation of this section shall be initiated within two years after the date on which the violation occurs.  Persons or organizations who prevail on a claim brought pursuant to this section shall be entitled to monetary damages, including for any psychological, emotional, or physical harm suffered, reasonable attorney's fees and costs, and any other appropriate relief.