Ill. Admin. Code tit. 50, § 2010.30
a) Advertisement
1) "Advertisement" shall include:
2) The definition of "advertisement" does not include:
i) "Invitation to Inquire" means an advertisement having as its objective the creation of a desire to inquire further about Medicare supplement insurance which is limited to a brief description of coverage, and which shall contain a provision in the following or substantially similar form:
"This policy has [exclusions] [limitations] [reductions of benefits] [terms under which the policy may be continued in force or discontinued]. For costs and complete details of the coverage, call [or write] your insurance agent or the company [whichever is applicable]."