Okla. Stat. tit. 60, § 177.1

That no public trust shall engage in any activity or transaction that is not expressly authorized in the instruments or articles prescribing its creation except by express consent of the governmental agency or governmental entity that created said public trust. However, a public trust with a county as the beneficiary and created for purposes of providing affordable housing may engage in the activity related to the conveyance of real property to nonprofit organizations for the purpose of affordable housing as may be provided by law. Laws 1970, c. 71, § 1, emerg. eff. March 17, 1970.