The California ISO has revised the operating procedures referenced below.

4510 Load Management Programs and Underfrequency Load Shedding, version 6.0, effective May 6, 2021

Annual Review: Updated Frequency to “Annual” to align with 4510A & 4510C.

Provided acronym detail in References section. Replaced instances of ISO with CAISO. Removed history prior to five-years. Minor format and grammar updates.

4510A Load Shed Calculation Guideline - Public Attachment, version 13.1, effective May 6, 2021

Updated percentages based on the different peak load date (Aug. 18, 2021 instead of Sept. 6, 2021).

ISO Operating Procedures - http://www.caiso.com/rules/Pages/OperatingProcedures/Default.aspx