Wash. Rev. Code § 51.32.067
(1) After a worker elects one of the options in (a), (b), or (c) of this subsection, that option shall apply only if the worker dies during a period of permanent total disability from a cause unrelated to the injury, leaving a surviving spouse, child, children, or other dependent. If, after making an election under this subsection, a worker dies from a cause related to the injury during a period of permanent total disability, his or her beneficiaries shall receive benefits under RCW 51.32.050 (2) through (5).
[ 2006 c 154 s 1; 1986 c 58 s 4.]