The EAC's Core Regulated Activities (CRA) fall under the jurisdiction of two Business Units:The Networks Business Unit and the Generation and Supply Business Unit.
The Networks Business Unit (NBU) is one of the two independent Business Units set up by the EAC in the framework of its Compliance with CERA's Regulatory Decision 04/2014 and it is responsible for the Core Regulated Activities (CRA) of Transmission and Distribution (monopoly activities since the electricity grid is considered internationally to be a natural monopoly). The CRA of Transmission has been organised in a single Unit, that of the Transmission System Owner (TSO), and the CRA of Distribution into two Units: the Distribution System Owner (DΑΟ) and the Distribution System Operator (DSO). The NBU is responsible for the development, construction, maintenance and management of the National Distribution Network as well as for the construction and maintenance of the National Transmission Network. The NBU also has jurisdiction over the EAC's four Area Offices.
The Generation and Supply Business Unit is the second of the two independent Business Units created by the EAC in order to comply with CERA's Regulatory Decision 04/2014 and it is responsible for the CRAs of Generation and Supply (competitive activities).