Ill. Admin. Code tit. 44, § 40.550 – State Residency

a) The veterans claiming 51% ownership and control of the applicant business must be living in the State of Illinois or, in the case of a corporation, at least 51% of the stock of which is owned by one or more qualified veterans living in the State of Illinois. Proof of residency may include Illinois driver's license or ID card, Illinois tax documents, or W-2s.
b) Qualifying SDVOSBs or VOSBs must provide proof that they have a home office in the State of Illinois.
(Recodified from Section 20.550 of 44 Ill. Adm. Code 20 (Central Management Services) pursuant to Section 45-57 of the Illinois Procurement Code [30 ILCS 500/45-57], at 47 Ill. Reg. 12484)