83 Ill. Adm. Code 461.100
Maintenance of Records
Section 461.100 Maintenance of Records
The applicant or certificate holder shall agree to adopt and
follow procedures ensuring that documentation regarding the installation of new
solar facilities is retained for a period of not less than 3 calendar years
after the calendar year in which it was created. These records shall be made
available by request to the Commission on a confidential and proprietary basis.