(1) The commissioner may take depositions, may subpoena witnesses or documentary evidence, administer oaths, and examine under oath any individual relative to the affairs of any person being examined, or relative to the subject of any hearing or investigation: PROVIDED, That the provisions of RCW 34.05.446 shall apply in lieu of the provisions of this section as to subpoenas relative to hearings in rule-making and adjudicative proceedings.
(2) The subpoena shall be effective if served within the state of Washington and shall be served in the same manner as if issued from a court of record.
(3) Witness fees and mileage, if claimed, shall be allowed the same as for testimony in a court of record. Witness fees, mileage, and the actual expense necessarily incurred in securing attendance of witnesses and their testimony shall be itemized, and shall be paid by the person as to whom the examination is being made, or by the person if other than the commissioner, at whose request the hearing is held.
(4) Enforcement of subpoenas shall be in accord with RCW 34.05.588.