Ohio Rev. Code § 2721.03: Construction or validity of instrument or legal provision.

Subject to division (B) of section 2721.02 of the Revised Code, any person interested under a deed, will, written contract, or other writing constituting a contract or any person whose rights, status, or other legal relations are affected by a constitutional provision, statute, rule as defined in section 119.01 of the Revised Code, municipal ordinance, township resolution, contract, or franchise may have determined any question of construction or validity arising under the instrument, constitutional provision, statute, rule, ordinance, resolution, contract, or franchise and obtain a declaration of rights, status, or other legal relations under it.

The testator of a will may have the validity of the will determined at any time during the testator's lifetime pursuant to Chapter 5817. of the Revised Code. The settlor of a trust may have the validity of the trust determined at any time during the settlor's lifetime pursuant to Chapter 5817. of the Revised Code.