Okla. Stat. tit. 60, § 60-175.4
Legal estate of person in possession and entitled to
rents and profits.
Every person who, by virtue of any transfer or devise, is
entitled to the actual possession of real property, and the receipts
of the rents and profits thereof, is deemed to have a legal estate
therein, of the same quality and duration, and subject to the same
conditions as his beneficial interest.