89 Ill. Adm. Code 14.21
Representation
Section 14
Section 14.21 Representation
The appellant may appear without
representation at the hearing or may be represented by legal counsel or other
authorized representative, in which case the appellant need not be present at
the hearing. The representative must have a written authorization signed by
the appellant prior to any action taken on behalf of the appellant. The action
or inaction of an authorized representative shall be deemed to be action or
inaction of the appellant.