Ill. Admin. Code tit. 83 § 465.40
The annual report required by Section 16-107.5(k) of the Act shall be filed electronically with the Chief Clerk of the Illinois Commerce Commission, in a manner that meets all filing requirements of the Commission's electronic filing system, by April 1 of each year. The report shall include all information required under Section 16-107.5(k) of the Act, including, but not limited to: the total number of net metering customers served by the electricity provider; the type, capacity and energy sources of the generating systems used by the electricity provider's net metering customers; whether the total generating capacity of the electricity provider's net metering customers equals or exceeds the 5% cap; and whether the electricity provider intends to limit the total generating capacity of its net metering customers to 5%. The Commission will maintain the reports required by this Section on the Commission's website.
Ill. Admin. Code tit. 83, § 465.40