Ohio Rev. Code § 3773.421: Out-of-state participant license.

The Ohio athletic commission shall issue a referee's, judge's, matchmaker's, timekeeper's, manager's, trainer's, contestant's, or second's license in accordance with Chapter 4796. of the Revised Code to an applicant if either of the following applies:

(A) The applicant holds a license in another state.

(B) The applicant has satisfactory work experience, a government certification, or a private certification as described in that chapter as a referee, judge, matchmaker, timekeeper, manager, trainer, contestant, or second in a state that does not issue that license.