(1) A party who is eligible for appointment of a qualified interpreter under chapter 2.42 or 2.43 RCW may waive interpreter services.

(2) A request for waiver must be made in writing or through a qualified interpreter on the record. When the request is made by a hearing-impaired party represented by counsel, the party's counsel must consent to the waiver.

(3) The ALJ must make a determination that the waiver has been knowingly, voluntarily, and intelligently made.

(4) A waiver of interpreter services may be withdrawn at any time before or during the proceedings.

(5) A waiver of interpreter services at the hearing constitutes a waiver of a right to challenge any aspect of the hearing based on a lack of understanding resulting from an inability to understand or a lack of proficiency in the English language.