Okla. Stat. tit. 57, § 562

The Department of Corrections is hereby authorized to employ Correctional Officer Cadets that will meet all the qualifications established for correctional officers in Section 510 of this title. After successful completion of the probationary period required in subsection D of Section 840-4.13 of Title 74 of the Oklahoma Statutes, Correctional Officer Cadets will be promoted to Correctional Officer I.