Ill. Admin. Code tit. 86, § 140.128
a) Effective January 1, 1996 through December 31, 2000, and on and after August 2, 2001, tangible personal property transferred incident to a sale of service to a lessor who leases that property to a governmental body is not subject to Service Occupation Tax. As noted in this subsection, the exemption is not available during the period January 1, 2001 through August 1, 2001 because it expired under the provisions of Section 3-55 of the Service Occupation Tax Act [35 ILCS 115/3-55]. The exemption is otherwise available, provided that:
b) When this exemption may be properly claimed, the service customer must give the serviceman a certification stating that the property is for lease to a governmental body, under a lease of one year or longer executed or in effect at the time of the purchase, and containing all of the following:
(Source: Amended at 26 Ill. Reg. 4905, effective March 15, 2002)