Section 231D.6 - Notice - appeal - emergency provisions1. The denial, suspension, or revocation of a certificate shall be effected by delivering to the applicant or certificate holder by restricted certified mail or by personal service a notice setting forth the particular reasons for the action. The denial, suspension, or revocation shall become effective thirty days after the mailing or service of the notice, unless the applicant or certificate holder, within the thirty-day period, requests a hearing, in writing, of the department, in which case the notice shall be deemed to be suspended.2. The denial, suspension, or revocation of a certificate may be appealed in accordance with rules adopted by the department in accordance with chapter 17A.3. When the department finds that an immediate danger to the health or safety of participants in an adult day services program exists which requires action on an emergency basis, the department may direct the removal of all participants in the adult day services program and suspend the certificate prior to a hearing.