Wash. Rev. Code § 68.64.090
(2) Subject to subsection (3) of this section, an anatomical gift by a person authorized under RCW 68.64.080 may be amended or revoked orally or in a record by any member of a prior class who is reasonably available. If more than one member of the prior class is reasonably available, the gift made by a person authorized under RCW 68.64.080 may be:
[ 2008 c 139 s 10.]