44 Ill. Adm. Code 950.120
Policy
Section 950
Section 950.120 Policy
As a general proposition, except
in instances of statutory exceptions, CDB shall award contracts to the lowest
responsible and responsive bidder. However, award of a contract based on the
lowest price alone can be false economy if there is subsequent default, late
deliveries, or other unsatisfactory performance resulting in additional
contractual or administrative costs. While it is important that Government
purchases be made at the lowest price, this does not require an award to a
contractor solely because that contractor submits the lowest offer.