ORC 2923.126 includes the following:
(b) A landlord may not prohibit or restrict a tenant who is a licensee and who on or after September 9, 2008, enters into a rental agreement with the landlord for the use of residential premises, and the tenant’s guest while the tenant is present, from lawfully carrying or possessing a handgun on those residential premises.
Other states would do well to have similar - I like that
Section 3 b
http://codes.ohio.gov/orc/2923.126