"Even if you vote for aggregation and your community passes a referendum in favor of it, you will not be required to sign up with an alternative electricity supplier," information from CUB states. "You can opt out of the program. Aggregation does not mean you will avoid utility rate hikes. It just means a different company is supplying your electricity. Your utility, Amern or ComEd, will still charge you for delivering the power to your home. Those "delivery" rates are what go up with the (Illinois Commerce Commission) grants utility increases. So, even if you participate in aggregation, you will still get billed for those delivery charges, along with the alternative supplier's charges."