Wash. Rev. Code § 18.59.100
An occupational therapist shall, after evaluating a patient and if the case is a medical one, refer the case to a physician for appropriate medical direction if such direction is lacking. Treatment by an occupational therapist of such a medical case may take place only upon the referral of a physician, osteopathic physician, podiatric physician and surgeon, naturopath, chiropractor, physician assistant, psychologist, optometrist, or advanced registered nurse practitioner licensed to practice in this state.
RCW 18.59.100
Savings-1986 c 259 §§ 101, 103: "The repeal of RCW 18.59.030 and 18.59.200 and the amendment of RCW 18.59.100 by this act shall not be construed as affecting any rights and duties which matured, penalties which were incurred, and proceedings which were begun before June 11, 1986." [ 1986 c 259 § 104.]
Severability-1986 c 259: See note following RCW 18.130.010.