On March 20, 2014, FERC approved the revised definition of Bulk Electric System (BES), as envisioned in FERC Order Nos. 743, 773, and 773-A. The definition includes bright-line core criteria with various enumerated inclusions and exclusions. FERC also approved the BES Exception Process for review of elements on a case-by-case basis to allow for exceptions from the definition, where appropriate. FERC also approved the Self-Determined Notifications Process for registered entities to notify regions of their respective determinations of BES elements. More information on these processes can be found on NERC’s BES Definition, Notification, and Exception Process page. For questions related to the application of the BES definition, email SERC at SERCregistration@serc1.org.