(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 incapacitated persons unless otherwise covered by chapters 11.88 and 11.92 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.