Illinois Statewide Technical Reference Manual

The Illinois Technical Reference Manual (IL-TRM) is updated on an annual basis. The IL-TRM Version 10.0 update was finalized in September 2021, and is pending Commission approval. Click here to visit the IL-TRM Version 10.0 page.

IL-TRM Policy Document

Participation in IL-TRM Update Process

The IL-TRM Technical Advisory Committee and annual IL-TRM update process is facilitated by VEIC. To join the IL-TRM Technical Advisory Committee and get access to the IL-TRM SharePoint site, please email the Illinois TRM Administrator, VEIC: [email protected].

​IL-TRM Request Tracker

There is a structured process at the beginning of each IL-TRM update cycle for participants to submit new measures and changes to existing measures. Participants may also submit measure requests to the IL-TRM Request Tracker on SharePoint throughout the year. Measure requests submitted past the deadline for annual IL-TRM updates may not be considered until the next update cycle.

Current Workpaper Template

Illinois Statewide IL-TRM Workpaper Template 2019

Illinois Net-to-Gross Methods

Click here for information on Illinois NTG Methods.

IL-TRM Errata Documents

Annual IL-TRM Update Pages

There is a separate page on the SAG website for each version of the IL-TRM. Click on the links below to access each page.

The links below include final versions of the IL-TRM and associated errata, beginning with the most recently completed (Version 8.0):

ICC Directives Regarding IL-TRM

ICC Dockets – Approval of IL-TRM

  • 13-0077: Adoption of policies for the IL-TRM
  • 12-0528: Approval of IL-TRM Version 1.0
  • 13-0437: Approval of IL-TRM Version 2.0
  • 14-0189: Approval of IL-TRM Version 3.0
  • 15-0187: Approval of IL-TRM Version 4.0
  • 16-0171: Approval of IL-TRM Version 5.0
  • 17-0106: Approval of IL-TRM Version 6.0
  • 18-1605: Approval of IL-TRM Version 7.0
  • 19-0954: Approval of IL-TRM Version 8.0
  • 20-0741: Approval of IL-TRM Version 9.0

Load Shape References

Sources and References Documents (Final Version 3.0)

Residential Measure References (zip files):

Other reference files (zip files):