Wash. Rev. Code § 18.130.420
(3) A license holder who is required to provide written notice under subsection (1) of this section must also obtain a signed consent form before performing the therapy. The consent form must be signed by the patient, or, if the patient is legally not competent, the patient's representative, and must state, in language the patient could reasonably be expected to understand:
(5) This section does not apply to the following:
(7) For purposes of this section:
[ 2018 c 216 s 1.]