Okla. Stat. tit. 70, § 2117

Each motor vehicle donated to the board of regents of an institution within The Oklahoma State System of Higher Education as provided for in Section 4 of this act may be operated for such purposes with a special license plate attached to the motor vehicle. The special license plate shall be issued for a fee of One Dollar ($1.00). The special license plate may be used only while the motor vehicle is in the possession or under the control of the board of regents.