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The California Public Utilities Commission (CPUC) has approved an interim implementation of PG&E's Electric Rule No. 30, requiring large load customers, such as data centers, to pay upfront for transmission infrastructure upgrades while refund policies are still being reviewed. Recent agreements with STACK Infrastructure and Microsoft have led to longer refund timelines, capping annual refunds at 75% of net revenues and extending periods from 10 to 15 years. The CPUC is set to finalize decisions on cost allocation and refund methodologies by late 2026.