RCW 89.30.817: Jurisdiction of courts—Action in rem—Power of court.

Said action shall be one in rem against all persons claiming any right or interest in the proceedings concerned and upon the hearing of such special proceedings the court shall have full power and jurisdiction to examine and determine the legality and validity of and to approve and confirm each and all of the proceedings mentioned in the petition seeking judicial determination and all other proceedings which may affect the proceedings in question.