Ohio Rev. Code § 5119.18
An appointing authority may appoint a person who holds a certified or permanent position in the classified service within the department of mental health and addiction services to a position in the unclassified service within the department. A person appointed pursuant to this section to a position in the unclassified service shall retain the right to resume the position and status held by the person in the classified service immediately prior to the person's appointment to the position in the unclassified service, pursuant to division (D) of section 124.11 of the Revised Code.
A person who holds a position in the classified service and who is appointed to a position in the unclassified service on or after January 1, 2016, shall have the right to resume a position in the classified service under this section only within five years after the effective date of the person's appointment in the unclassified service.
R.C. § 5119.18