PJM Interconnection, the grid operator for 13 states, released a proposal last month aimed at keeping data centers from spiking power prices. The plan is notable for what it does not do: it largely leaves enforcement to states rather than imposing uniform rules across PJM’s whole territory.

Pennsylvania, one of the biggest states in PJM’s footprint, is already acting on that opening. The state is taking up the issue, though the details of its approach are still emerging. The source does not describe any disagreement between PJM and Pennsylvania, but it makes clear that the plan’s effectiveness will depend on how states respond.