Ill. Admin. Code tit. 83, § 550.30
c) When an affiliated interest in competition with ARGS markets or advertises to the public using the natural gas utility's name or logo, it shall include a legible disclaimer that states:
3) that a customer does not have to buy products or services from the affiliated interest in competition with ARGS in order to receive the same quality service from the gas utility.
When an affiliated interest in competition with ARGS advertises or communicates verbally through the radio or television to the public using the gas utility's company name or logo, the affiliated interest in competition with ARGS shall include at the conclusion of any such communication a legible disclaimer that includes all the disclaimers listed in subsections (c)(1), (2) and (3).