(1) Subject to the provisions of RCW
11.96A.260 through
11.96A.320, any party may have a judicial proceeding for the declaration of rights or legal relations with respect to any matter, as defined by RCW
11.96A.030; the resolution of any other case or controversy that arises under the Revised Code of Washington and references judicial proceedings under this title; or the determination of the persons entitled to notice under RCW
11.96A.110 or
11.96A.120.
(2) The provisions of this chapter apply to disputes arising in connection with estates of individuals subject to conservatorship under RCW
11.130.360 unless otherwise covered by chapter
11.130 RCW. The provisions of this chapter shall not supersede, but shall supplement, any otherwise applicable provisions and procedures contained in this title, including without limitation those contained in chapter
11.20, 11.24, 11.28, 11.40, 11.42, or
11.56 RCW. The provisions of this chapter shall not apply to actions for wrongful death under chapter
4.20 RCW.