Okla. Stat. tit. 36, § 36-2665: Tax exemption

Every corporation doing business pursuant to this article is

hereby declared to be a nonprofit and benevolent institution and to

be exempt from state, county, district, municipal and school tax,

including the taxes prescribed by the Oklahoma Insurance Code, and

excepting only the fees prescribed by Section 321 of the Oklahoma

Insurance Code, and taxes on real and tangible personal property

situate within this state.