The Supreme Court today affirmed the Commonwealth Court’s invalidation of Pennsylvania Public Utility Commission (“PUC” or “Commission”) regulations that had the effect of blocking alternative energy project developments of 5 MW or less that propose to use net metering. The PUC’s regulation had defined a developer of a net metering project as a “utility”; because the legislature in the PUC-administered Alternative Energy Portfolio Standards Act (“AEPS”), 73 P.S. §§1648.1, et seq. prohibited a “utility” from participating in net metering, the PUC’s regulation made it impossible for an alternative energy project developer from availing itself of net metering, essentially rendering such projects uneconomic. The Independent Regulatory Review Commission (“IRRC”) had voted to disapprove this attempt by the PUC to block developers from using net metering in their projects, but the PUC submitted the regulations for legislative approval anyway, and because the general assembly was not in session, the IRRC process allowed the regulations to become law.