Washington Revised Code Title 18. Businesses and Professions § 18.210.020. Unprofessional conduct

(1) Practicing with a *practice permit or license issued under this chapter that is expired, suspended, or revoked;

(2) Being willfully untruthful or deceptive in any document, report, statement, testimony, or plan that pertains to the design or construction of an on-site wastewater treatment system;

(3) Submission of a design or as-built record to a local health jurisdiction, to the department of health, or to the department of ecology, that is knowingly based upon false, incorrect, misleading, or fabricated information; and

(4) Submission of any application for licensure or certification that contains false, fraudulent, or misleading information.