44 Ill. Adm. Code 1300.10
Application
Section 1300
Section 1300.10 Application
a) The Code and this Part apply to those procurements for which bidders,
offerors, potential contractors or contractors were first solicited on or after
July 1, 1998.
b) Procurements for which bidders, offerors, potential
contractors or contractors were first solicited on or before June 30, 1998,
shall be conducted pursuant to legal requirements in effect at the time of the
solicitation. The terms and conditions and the rights and obligations under
contracts resulting from these procurements shall not be impaired.