Ohio Rev. Code § 3796.22: Rights of registered patient.

(A) Notwithstanding any conflicting provision of the Revised Code, a patient registered under this chapter who obtains medical marijuana from a licensed dispensary in accordance with this chapter may do all of the following:

(1) Use medical marijuana;

(2) Possess medical marijuana, subject to division (B) of this section;

(3) Possess any paraphernalia or accessories that may be used in the administration of medical marijuana, as specified in rules adopted under section 3796.03 of the Revised Code.

(B) The amount of medical marijuana possessed by a registered patient shall not exceed a ninety-day supply, as specified in rules adopted under section 3796.03 of the Revised Code.

(C) A registered patient shall not be subject to arrest or criminal prosecution for doing either of the following in accordance with this chapter:

(1) Obtaining, using, or possessing medical marijuana;

(2) Possessing any paraphernalia or accessories that may be used in the administration of medical marijuana, as specified in rules adopted under section 3796.03 of the Revised Code.

(D) This section does not authorize a registered patient to operate a vehicle, streetcar, trackless trolley, watercraft, or aircraft while under the influence of marijuana.