50 Ill. Adm. Code 2402.90
Service of the Notice of Hearing
Section 2402
Section 2402.90 Service of
the Notice of Hearing
Service shall be complete when
the Notice of Hearing is served in person or deposited in the United States
mail, postage prepaid, registered or certified, addressed to the last known
address of the persons, partnerships, associations or companies involved, not
less than 10 days before the date designated for the Hearing.