Ohio Rev. Code Ann. § 5321.131
(A) No landlord shall include any restriction in a rental agreement against, or otherwise prohibit on a tenant's rental property, any of the following:
(1) The display of the flag of the United States or the national league of families POW/MIA flag if the flag is displayed in accordance with any of the following:
(B)
(1) A tenant who requests to display the flag of the United States or the national league of families POW/MIA flag at the rental property as provided in division (A)(1) of this section through the use of a flag pole shall contact the landlord with reasonable notice before installation of the flag pole to discuss the following:
(2) A tenant who requests to display the flag of the United States or the national league of families POW/MIA flag at the rental property as provided in division (A)(1) of this section through the use of a bracket to be permanently affixed to the unit, shall contact the landlord with reasonable notice before installation of the bracket to discuss the following: