PDFRCW 11.100.015
Guardians, guardianships and funds are subject to chapter.
In addition to other fiduciaries, a guardian of any estate is a fiduciary within the meaning of this chapter; and in addition to other trusts, a guardianship of any estate is a trust within the meaning of this chapter; and in addition to other trust funds, guardianship funds are trust funds within the meaning of this chapter.