Okla. Stat. tit. 19 § 431
From all decisions of the board of commissioners, upon matters properly before them, there shall be allowed an appeal to the district court by any persons aggrieved, including the county by its district attorney, upon filing a bond with sufficient penalty, and one or more sureties to be approved by the county clerk, conditioned that the appellant will prosecute his or her appeal without delay, and pay all cost that he or she may be adjudged to pay in the said district court; said bond shall be executed to the county, and may be sued in the name of the county upon breach of any condition therein; provided, that the district attorney, upon the written demand of at least fifteen (15) freeholders of the county, shall take an appeal from any action of the board of county commissioners when said action relates to the interest or affairs of the county at large or any portion thereof, in the name of the county, when he deems it to the interest of the county so to do; and in such case no bond shall be required or given and upon serving the notice provided for in the next section the county clerk shall proceed the same as if a bond had been filed; provided, further, that if the district attorney shall fail or refuse to appeal after the written demand of the said fifteen (15) freeholders, then any resident taxpayer of the county may be considered a person aggrieved and may appeal upon filing a bond with sufficient penalty, as provided in the foregoing portion of this paragraph.
Okla. Stat. tit. 19, § 431