On April 24, 2017, PJM Interconnection, L.L.C. (“PJM”) submitted an amicus curiae brief in a legal challenge against an Illinois program to provide additional revenue for some of the state’s financially-struggling nuclear energy facilities. The program allows eligible generators to generate and sell Zero Emission Credits (“ZECs”) and obligates the state’s utilities to buy a certain share of those credits. In its brief, PJM argued that the program allows uneconomic generators to continue participating in wholesale energy and capacity markets, thereby causing “substantial[] harm” to the markets and other participating generators.