RCW 46.09.350

The operator of any nonhighway vehicle involved in any accident resulting in injury to or death of any person, or property damage to another to an apparent extent equal to or greater than the minimum amount established by rule adopted by the chief of the Washington state patrol in accordance with chapter 46.52 RCW, or a person acting for the operator shall submit such reports as are required under chapter 46.52 RCW, and the provisions of chapter 46.52 RCW applies to the reports when submitted.