Okla. Stat. tit. 11 § 24-106
It is hereby found, determined, and declared that the creation of the Authority and the carrying out of its corporate purposes are in all respects for the benefit of the people of this state and that the Authority is an institution of purely public charity performing an essential governmental function and all property of said Authority (including the Authority's interest in any property held jointly with any other person) is hereby declared and shall in all respects be considered to be public property and title to such property shall be held by the Authority only for the benefit of the public and the use of such property pursuant to the terms of this act shall be and is hereby declared to be for essential public and governmental purposes, that is, for the promotion of public general welfare in the matter of providing an adequate, dependable and economic electric power supply in an effort to better the general condition of the residents of the State of Oklahoma, and all of the property of and income, obligations and interest on all the bonds and notes of the Authority and the transfer thereof shall be and hereby are declared to be nontaxable for any and all purposes by the State of Oklahoma or any of its political subdivisions.
Okla. Stat. tit. 11, § 24-106