Enrollment Options
Ameren Illinois customers have the following power supply options from which to choose:
RES (Retail Electric Supplier)-supplied power and energy
	Customer receives supply from a retail electric supplier.
Company-supplied power and energy
	Rider BGS (Basic Generation Service)
	A fixed price option for accounts with demands less than 400 kW. Accounts with demands between 400 kW and 1,000 kW that are currently on BGS may remain on BGS through May 31, 2010.
	Rider RTP (Real Time Pricing)
	An hourly price option for customers with demands less than 400 kW.
	Rider HSS (Hourly Supply Service)
	An hourly option for customers with demands greater than or equal to 400 kW.
	Rider RTP-LI (Real Time Pricing-Large Interruptible)
	Provides power and energy supply service that may be interrupted for reliability purposes for accounts served on Rate DS-4 with demands greater than 5,000 kW.
Ameren Illinois customers have delivery service from AmerenCILCO, AmerenCIPS or AmerenIP.
Information for Nonresidential Customers
For additional information on supply options for a nonresidential customer, please contact your service company:
			AmerenCILCO		877.677.5740
			AmerenCIPS		800.232.2477
			AmerenIP		800.363.6805