220 ILCS 30/3.12
"Premises" means a physical area (a) which, except for any intervening public or private rights of way or easements, constitutes a single parcel or unit and (b) which a single customer owns, uses or in which it has some other interest in connection with receiving service at one or more points of delivery.
(from Ch. 111 2/3, par. 403.12)
(Source: Laws 1965, p. 1206.)