NRG Business Marketing LLC v. FERC, No. 23-2560 (3d Cir. 2024)
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In this case, a group of electricity suppliers and their trade associations challenged orders of the Federal Energy Regulatory Commission (FERC) that permitted PJM Interconnection L.L.C., a wholesale market operator, to apply a new auction rule retroactively to a pending auction. The petitioners argued that FERC's orders violated the filed rate doctrine, which prohibits retroactive rates. The United States Court of Appeals for the Third Circuit agreed and granted the petitions, vacating the relevant parts of the orders.
The central issue revolved around the Locational Deliverability Area (LDA) Reliability Requirement, a key parameter in PJM's auction process. Prior to the auction, PJM had miscalculated the LDA Reliability Requirement, which led to a potential price increase for a specific region. To correct this, PJM sought FERC's permission to amend the tariff to allow for a downward adjustment of the LDA Reliability Requirement. FERC granted this permission, allowing the new rule to apply to the ongoing auction, which the petitioners argued was a retroactive change in violation of the filed rate doctrine.
The court found that the tariff amendment was indeed retroactive as it altered the legal consequence attached to a past action, specifically, PJM's calculation and posting of the LDA Reliability Requirement. The court held that the filed rate doctrine did not yield to equities and that the tariff amendment's retroactivity created instability in the electricity market. Consequently, the court 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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