On March 31, 2026, the Alberta Electric System Operator (AESO) held a workshop concerning the Internal Demand Rate (IDR) revamp. Previously called the ISO tariff, the new name reflects the fact that the current tariff application changes are part of the broader Restructured energy market (REM). The goal of this workshop was to engage stakeholders and solicit feedback on potential transmission rate design features.
For context, the AESO had last asked for approval for a tariff redesign in 2021, but was rejected by the Alberta Utilities Commission (AUC). While not set in stone, many of the features discussed in the recent workshop were heavily based on earlier AUC feedback.
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