(625 ILCS 5/1-162.5)
(from Ch. 95 1/2, par. 1-164)
Principal place of business.
The place where any person transacts his principal business, or where he
makes up and approves his payroll, maintains a central file of records and
maintains his principal executive offices. In the event that not all of
these functions are performed in one place, then that place where a
majority of such functions are performed or the place where such person
does in fact principally transact and control his business affairs.
(Source: P.A. 90-89, eff. 1-1-98.)