On June 18, 2026, the Federal Energy Regulatory Commission (FERC or the Commission) issued six show cause orders directing each Regional Transmission Organization and Independent System Operator (RTO/ISO) under its jurisdiction to justify or revise its tariff provisions governing large-load interconnection and co-location arrangements. The orders represent the Commission’s most comprehensive effort to date to establish a regulatory framework for connecting data centers and other large loads while protecting grid reliability and existing customers from cost shifts.