Ohio Rev. Code § 3773.49: Advertising and tickets to display price.

Each person who conducts a public boxing or wrestling match or exhibition shall cause to be inserted into each advertisement of the match or exhibition the price of admission.

Each ticket of admission to any such match or exhibition shall clearly bear the purchase price. No person shall sell such a ticket for a price greater than that printed on the ticket. No tickets shall be sold except from the box office on the premises in which the match or exhibition is held or such additional locations as the Ohio athletic commission has authorized in writing as locations from which tickets may be sold for a designated match or exhibition.