The ECC is for the operation, maintenance and upgrade of the Gerus earth electrode line and station. In 2010, NamPower completed the construction of the 350kV High Voltage Direct Current (HVDC) line also known as Caprivi link interconnector) from Gerus substation west north west of Otjiwarongo to Zambezi substation near Katima Mulilo. The purpose of the 350 kV HVDC line, is to facilitate the transmission of electricity in the SADC region in order to provide better interconnection between import and export zones and strengthen the north eastern grid. The 350 kV HVDC line consist of a transmission line between Gerus and Zambezi Substation and supporting infrastructures. The supporting infrastructure include: Earth Electrode Sites (including the earth electrode lines), Repeater Station; and Converter Station (at each substation). The earth electrode stations and associated infrastructure were not part of the ECC obtained for the construction and operation of the 350 kV HVDC line. The ECC for the earth electrode stations and lines were obtained in 2014 and subsequently renewed in 2017. The ECCs have since expired and renewal is required.