Okla. Stat. tit. 20, § 20-641: Transfer on creation or alteration of county

Whenever part of a county has been transferred to another

county, or a new county has been created out of an existing county,

as provided by law, all civil, criminal, probate and other causes

pending in the district and county courts of the original county,

shall be transferred to the county as would be proper venue for such

action or proceeding had the same been commenced after attaching

said part of a county to an existing county, or creating said new

county; provided, that the provisions of this section shall not

apply to counties in which there is at present pending a court

action to determine the legality of the transfer or transferring of

any territory from one county to another county, or the creation of

a new county, until the matter has been finally determined by the

courts.