Governance
In 2015, the ISO formed a transitional committee, comprised of stakeholders from across the West, to develop a governance structure for the Western Energy Imbalance Market (WEIM). The WEIM’s growth has resulted in additional economic, reliability, and environmental benefits.
In response to a continuously evolving energy market and expanding footprint, the ISO Board of Governors and WEM Governing Body created a Governance Review Committee to develop and propose refinements to the WEIM’s governance. Formalized in the Transitional Committee and Governance Review Committee charters, western stakeholders created and continue to improve the governance framework that established the Governing Body, the Body of State Regulators (BOSR), and the Regional Issues Forum. The Extended Day-Ahead Market (EDAM) will build upon these benefits by optimizing the transmission system and resources across a larger day-ahead timeframe.
Governance foundational documents
- Charter for WEIM and EDAM Governance07/01/2025, 9:08 AM
- Selection Policy for the WEM Governing Body02/20/2025, 8:24 AM
- Memorandum - Decisional Designations For Stakeholder Initiatives02/28/2022, 8:56 AM
- Decisional Classification Guidance for Handling Policy Initiatives - WEM Governing Body07/01/2025, 9:08 AM
- ISO Corporate Bylaws (amended and restated)03/25/2024, 12:12 PM
Nominating committee
Nominees for the WEM governing body are identified by a nominating committee comprised predominantly of stakeholders as vacancies occur. The first candidate slate was approved by the ISO Board of Governors on June 28, 2016, and all future nominations will be approved by the WEM Governing Body. For more information about the nominating committee or its current members, use the links below. The Extended Day-Ahead Market (EDAM) will build upon these benefits by optimizing the transmission system and resources across a larger day-ahead timeframe.
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| 2026 WEM Governing Body Nominating Committee Members | 12/18/2025, 10:41 AM | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| WEIM Nominating Committee Guidelines - June 2021 | 06/24/2021, 1:13 PM | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Governance development
Governance Review Committee
This temporary advisory group provides recommendations to the WEM Governing Body and the California ISO Board of Governors regarding WEIM governance matters.
WEIM Governance Development
This 2014 effort developed a long-term governance structure on WEIM issues.
WEIM Foundation
The California ISO worked extensively with stakeholders to provide Western Energy Imbalance Market (WEIM) services to other balancing authorities in the west.