Okla. Stat. tit. 30, § 4

§30-4-101. Appointment as guardian of more than five wards prohibited - Exceptions. No person shall be appointed guardian of any minor or incapacitated or partially incapacitated person, who is, at the time of the hearing of the application for appointment, the guardian of as many as five persons, other than his own family or relatives. The provisions of this section and Section 4-102 of this title shall not apply to boards of control and superintendents of eleemosynary or charitable institutions, under the control and charge of the state, where under the law such boards of control and superintendents may be appointed as guardians of the estates, or of the persons, of those committed to their charge or safekeeping. The provisions of this section shall not prohibit the appointment of officers or managers of fraternal or benevolent orders or homes and church orphanages as to inmates of such institutions. This section shall in no way alter or repeal the provisions of Section 1001 of Title 6 of the Oklahoma Statutes, or Section 126.4 of Title 72 of the Oklahoma Statutes.