Section 622.57 - Waiver of hearing; consent(a)Waiver. Failure to request a hearing pursuant to § 622.56 constitutes a waiver of the opportunity for a hearing and the notice of assessment issued pursuant to § 622.55 will constitute a final and unappealable order.(b)Consent. Any party afforded a hearing who does not appear at the hearing personally or by a duly authorized representative is deemed to have consented to the issuance of an assessment order.51 FR 21139, June 11, 1986, as amended at 70 FR 12585 , Mar. 15, 2005