PJM Power Providers Group v. FERC, No. 23-2612 (3d Cir. 2024)
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In a case involving the Federal Energy Regulatory Commission (FERC) and a group of petitioners, the petitioners challenged FERC's decision to allow a new auction rule to be applied retroactively. The auction in question, run by PJM Interconnection LLC, determines the selling price for electricity. The petitioners argued that the retroactive application of the new rule violated the filed rate doctrine, which prohibits retroactive rates.
The court agreed with the petitioners, granting their petitions and vacating the orders in question. The court found that the new rule was retroactive because it changed the legal consequence of a past action, specifically the calculation and posting of the Locational Deliverability Area (LDA) Reliability Requirement. The LDA Reliability Requirement is a parameter used in the auction to determine the amount of electricity that must be produced to meet peak demand.
The court noted that while the new rule allowed PJM to adjust the LDA Reliability Requirement downward to account for certain resources' lack of participation in the auction, the original tariff did not provide for this adjustment. Therefore, the new rule altered the legal consequence of the past action of calculating and posting the LDA Reliability Requirement.
The court concluded that the retroactive application of the new rule violated the filed rate doctrine, and therefore FERC's approval of the rule was not in accordance with the law. The court emphasized that the doctrine's goal of predictability is of utmost importance and that FERC and the courts must respect the doctrine to ensure stability in the markets. As a result, only the portion of FERC's orders that allowed the new rule to be applied to the specific 2024/25 capacity auction was vacated.
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