Ill. Admin. Code tit. 56, § 230.230
a) Employer notice to each affected employee shall contain:
3) an indication as to whether bumping rights exist; and
b) Employer notice to representatives of affected employees shall contain:
c) Employer notice to the Department of Commerce and Economic Opportunity, the Illinois Department of Labor and the chief elected official of each municipal and county government within which the mass layoff or plant closing occurs shall contain:
5) an indication as to whether bumping rights exist; and
d) An alternate employer notice may be given in lieu of the notice requirements set forth in subsection (c). However, an employer shall maintain the other information that is required by subsection (c) on site and be able to produce this information upon request. Failure to produce this information upon request is deemed a failure to give the required notice. An employer giving alternate notice under this subsection (d) shall provide: