Class D Permits are off-limits, per Ohio RevisedCode 2923.121, however; there are some exceptions, under 2923.121(B) through 2923.121(D).
Schools, per Ohio Revised Code 2923.122, however; there are some exceptions, under 2923.122(D).
Courthouses/Courtrooms, per Ohio Revised Code 2923.123(A) through 2923.123(B). Exceptions for Government personnel, 2923.123(C)(1) through 2923.123(C)(6).
Private Property, where posted, in accordance with 2923.1212(A), however; the Code Title, itself, reads Concealed Weapons, but apparently, the Law here applies to all Weapons, whether they are Concealed or not. The list is mostly Law-Enforcement/Judicial Government Buildings (Police Stations, Sheriff's Office/Jails/Prisons/etc.), however; this can also be applied to Local Buildings under 2923.1212(A)(9). The Law reads '...shall Post.', but the Law then says, '... if Posted.' Just assume these places off-limits, unless Counsel advises otherwise.
Jails/Prisons, per Ohio Revised Code 2923.131.
While under Disabilty, anywhere, such as Drunkeness, per Ohio Revised Code 2923.13 and 2923.15..
2923.16 of Ohio Revised Code, concerning Motor Vehicles, and 2923.12, of Ohio revised Code, concerning Concelaed Weapons, does not apply to Persons with Licenses to Carry Concealed, or their Ohioan equivalents from other States within there is found reciprocity.
State-wide Preemption, therefore, Ohio Law defeats Local Gun Bans, per Ohio Revised Code 9.68(A) and Ohio Constituion 1.04.