Okla. Stat. tit. 2, § 15-144
The Trust Authority shall be composed of from nine to twenty-one trustees, to be determined by the board of county commissioners in multiples of three. Each county commissioner shall appoint the same number of trustees for three-year terms and such terms shall be staggered, all subject to confirmation by the board of county commissioners.
(c) The next one-third of said trustees shall serve for an initial term of three (3) years from the date of their appointment.
After expiration of the aforesaid initial terms, the term of said trustees shall be three (3) years. All trustees of such Trust Authority shall serve as such without compensation, and the appointed trustees shall hold no other municipal, county, state or federal elective office. A vacancy occurring other than through the expiration of a term shall be filled for the remainder of the unexpired term by the commissioner who made the appointment that becomes vacant.
It is the legislative intent that the appointment of trustees made by the commissioners, insofar as possible, shall represent the full geographical area of the county and all areas of participation in the fair and fairground operations. As soon as practicable after the act becomes in force and effect, the board of county commissioners of any such county shall appoint the trustees of the Trust Authority as herein provided, and the terms of such trustees shall be as follows:
Laws 1970, c. 335, § 4, emerg. eff. April 23, 1970.