Mich. Admin. Code R. 257.309
(2) With respect to an appeal hearing, except for reasonable cause to be determined by the administrator or hearing officer, the failure of the petitioner to appear has the following effect:
(3) With respect to an implied consent hearing, except for reasonable cause to be determined by the administrator or hearing officer, the failure of a party to appear has the following effect:
History: 1998-2000 AACS.