Okla. Stat. tit. 65 § 3-105
The departmental functions shall include but not be limited to library services, library research, library development, archival, records management and preservation, legislative reference, legal reference, general reference, library promotion and public information, informational, information processing and retrieval, government documents and any allied, cognate or related functions, and the Department shall be the authority of the state for these functions.
The Department is authorized and directed to discharge the state's responsibility for library service, including service to state government, to public and special libraries and library services, cooperation with and rendering of services to local units of government in the establishment and operation of local libraries and library systems, and the performance of all technical and other services necessary to the Department. The Department shall assist with and supervise the establishment and operation of libraries at all state institutions and agencies, except public schools and institutions of higher learning.
Okla. Stat. tit. 65, § 3-105