PJM turned the second half of its large-load package into a live federal case, filing at the Federal Energy Regulatory Commission — docket ER26-3515, with a requested effective date of 12 October 2026 — a framework built on a simple rule: a new data centre or other large load must bring, build or buy its own new generation, or accept being curtailed ahead of ordinary customers when supply runs short. The obligation is narrower than the headline: a New Large Load is one entering service or adding demand after 1 June 2027 with a cumulative peak of at least 50 megawatts at a single electrical site, affiliated facilities within a mile counting as one site — and crossing that threshold does not by itself trigger anything. Only the portion of demand its supplier has not matched with designated qualifying new capacity is exposed to the new Interim Resource Adequacy Service, so a load that covers its registered peak faces no curtailment at all. What counts as cover is broad: new generation, uprates, surplus interconnection service, repowered plant, fuel conversions, storage, certain demand and distributed-energy resources, or capacity allocated from the backstop procurement PJM filed in July. For the remainder, when the grid approaches dangerously low supply, utilities would be directed to reduce or transfer that demand before any measure that shuts off traditional consumers, including residents, and before calling on the load-management customers who are paid in advance to curtail; a curtailed load can earn a reliability credit or, per the Ratepayer Protection Pledge the filing is built around, waive it. The plan leans on the Large Load Registry PJM's board directed in July — proposed Schedule 11 would require a site's location, peak demand, ramp schedule, telemetry, backup generation and supply contracts — and adds a sharper lever: beginning with the 2029/2030 capacity auction, unsupported new large load would be subtracted from the demand PJM procures capacity to serve. As with the board's July direction, the retail question is pushed downward — which specific customers bear the cost, and how, is left to state-level entities. PJM attributes 30 of the 32 gigawatts of demand growth it forecasts between 2024 and 2030 to data centres, and asked FERC to rule within 60 days. Nothing is in force; this is the connect-and-manage piece that runs alongside the Reliability Backstop Procurement PJM filed on 31 July, and it needs federal approval before it binds anyone.