56 Ill. Adm. Code 2720.10
Computation of Time
Section 2720
Section 2720.10 Computation of
Time
a) The calendar day on which any notice, decision or order is
mailed or electronically transmitted by the Department shall be excluded in
computing time.
b) The calendar day on which notice is due from a party or from
an employing unit that is seeking to become a party (see Section 2720.130(a))
or action is required by a party or by an employing unit that is seeking to
become a party shall be included in the computation of time.
c) If the last day a document may be filed by a party or by an
employing unit that is seeking to become a party is a day on which the Department
facility is closed, the due date is extended to the end of the next day the
facility is open.
d) The date on the document shall be rebuttable evidence that it
was mailed on that date; a postmark placed on the envelope by the U.S. Postal
Service shall be conclusive evidence of the date of mailing; when a Notice of
Claim to Last Employing Unit and Last Employer or other Interested Party is
electronically transmitted to an employing unit (or its authorized agent), the
date of transmission shown on the Department's records shall be conclusive
evidence of the date of service of the Notice.