IC 039. US 100 105. G & S: Storage, transportation, transmission, distribution and delivery of energy; distribution and delivery of electrical and thermal energy as well as gas; public utility services in the nature of electricity and gaseous fuels distribution; transportation of gas through pipelines

IC 040. US 100 103 106. G & S: Production of electrical and thermal energy as well as steam; production of electrical and thermal energy as well as steam from renewable energy sources; production of gas and biomass from reusable materials; production of biomethane

IC 042. US 100 101. G & S: Scientific and technological services, namely, scientific research work and related design services in the field of energy production and energy supply; industrial analysis and research services in the field of energy production and energy supply; technical planning and design of plants for producing and transporting energy; technical planning and design of power stations; consultancy in the sector of energy saving, namely, in the field of energy measurement to improve energy efficiency; technical computer project management services; engineering services in the sector of consumption metering, registration, recording, processing, evaluation and transmission of data, in particular measured data