Okla. Stat. tit. 43A, § 43A-2-301
Office, records and files
The principal office of the Department, with all records and
files of same, shall be maintained in Oklahoma City, Oklahoma and
shall be designated the central office. Names of all personnel
employed in each institution in the Department; all essential and
important data; statistical information and correspondence relative
to the Department and its institutions shall be filed in the office
of the Commissioner and by his supervision.