Iowa R. Juv. P. 8.17
Where a juvenile has been placed in another judicial district and is alleged to have committed a delinquent act or acts during such placement, venue, for the purpose of conducting the adjudicatory hearing, shall be in the judicial district where the delinquent act or acts are alleged to have occurred. However, the juvenile court which originally placed the juvenile shall have the option of requesting that venue be transferred to it for the purpose of conducting the adjudicatory proceedings. If the juvenile is adjudicated of committing a delinquent act or acts in the judicial district of the juvenile's placement, venue of the matter shall be transferred to the juvenile court which previously placed the child pursuant to the original dispositional order for the purpose of conducting any dispositional and subsequent review hearings.
Iowa. R. Juv. P. 8.17