Constellation Energy Generation LLC v. FERC, No. 23-2544 (3d Cir. 2024)
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The case involves a dispute over the Federal Energy Regulatory Commission (FERC) allowing a new auction rule to apply retroactively to a pending auction. This auction was administered by PJM Interconnection L.L.C., an entity responsible for running the auction. The petitioners, electric suppliers and their trade associations, contended that FERC's orders violated the filed rate doctrine, which forbids retroactive rates.
The United States Court of Appeals for the Third Circuit found that the Tariff Amendment was retroactive because it altered the legal consequence attached to a past action when it allowed PJM to use a different Locational Deliverability Area (LDA) Reliability Requirement than the one it had calculated and posted. The court noted that the Tariff Amendment, therefore, violated the filed rate doctrine.
The court ruled that the doctrine's predictability is crucial because electricity markets depend on it. FERC’s disregard of the filed rate doctrine created unpredictability in the markets, potentially eroding confidence in the markets and ultimately harming consumers who buy electricity in those markets.
The court granted the petitions for review and vacated the portion of FERC’s orders that allowed PJM to apply the Tariff Amendment to the 2024/25 capacity auction.
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