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December 5, 2025

Arizona Corporation Commission (AZ CC)

ACC
TEP Wins Approval for Data Center Energy Supply Agreement
Arizona regulators approved a 286-MW energy supply agreement between Tucson Electric Power and the developer of an embattled data center project near Tucson.
Tri-State Generation and Transmission Association
West Needs Unified IBR Approach, WIRAB Says
Western state utility commissioners should encourage “standardization and harmonization” to effectively integrate inverter-based resources throughout the region, according to a guide developed by WIRAB and Elevate Energy Consulting.
Google
A Cooperative Path for Large-Load Interconnection: Why States and FERC Must Work Together
The U.S. is facing an unprecedented wave of demand growth. Competition between states and FERC is not the answer. Cooperation is, says Nick Myers of the Arizona Corporation Commission.
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NARUC Report Seeks to Make Headway on Gas-electric Challenges
A new report from the National Association of Regulatory Utility Commissioners offers state regulators an extensive set of recommendations intended to address risks stemming from the ever evolving interdependence of the natural gas and electric sectors in the U.S.
Office of Assemblymember Cottie Petrie-Norris
Pathways Bill Passes Calif. Legislature in Lopsided Votes
California lawmakers have passed a landmark bill that will allow CAISO to transition the governance of its markets to the independent “regional organization” envisioned by the West-Wide Governance Pathways Initiative.
APS
Arizona Renewable Standard on the Chopping Block
Arizona regulators are moving toward a repeal of a renewable energy standard for utilities, saying the mandate has cost ratepayers billions of dollars since it was adopted in 2006.
Arizona Public Service
Arizona Utilities Explore Expanded Use of Nuclear

Arizona utilities are seeking U.S. Department of Energy funding to help plan for additional nuclear power facilities in the state.

Center for Land Use Interpretation
APS to Keep Cholla Plant Closed Despite Trump Order Backing Coal
APS officials said they are looking to a non-coal future for the recently closed Cholla coal-fired power plant, despite President Donald Trump’s calls to keep the facility running.
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Ariz. Commissioner Questions Utility Decisions to Join SPP’s Markets+
Arizona Corporation Commissioner Kevin Thompson said he thinks his state’s four major utilities may have erred in committing to joining SPP’s Markets+ instead of CAISO’s Extended Day-Ahead Market.
Nick Myers via X
Western Regulators Clarifying Their Role in Markets+
Arizona regulator Nick Myers, chair of the Markets+ State Committee, is drafting a document as part of SPP's compliance filing that better explains the role Western state commissioners will play in the day-ahead market's development and operations.

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