83 Ill. Adm. Code 452.120
Tying
Section 452
Section 452.120 Tying
No electric utility shall tie,
as defined by State and federal anti-trust laws:
a) the provision of any delivery services to the taking of any
goods and services from the electric utility's generation function; or
b) the provision of any mandatory generation service to the
taking of any other product or service offered by the utility.