ORS § 421.215
If the presence of any adult in custody confined in a county jail or in the institution of another state or the federal government, is required in any judicial proceeding of this state, the superintendent in charge of the institution from which the adult in custody was conveyed, upon being so directed by the Director of the Department of Corrections or upon the written order or direction of any court of competent jurisdiction or of a judge thereof, shall procure such adult in custody, bring the adult in custody to the place directed in such order and hold the adult in custody subject to the further order and direction of the director, or of the court or of a judge thereof, until the adult in custody is lawfully discharged from custody. The superintendent shall, by direction of the director or of the court or a judge thereof, deliver such adult into the custody of the sheriff of the county in which the adult in custody was convicted, and shall, by like order, return such adult in custody to the institution from which the adult in custody was taken.
ORS 421.215