Generators and trades associations are being consulted by government on a system to assure buyers of green energy that their electricity is from renewable sources. The Renewable Energy Guarantee of Origin (REGO) is being implemented to comply with the EU renewables directive. As an EU-wide system, it will also guarantee green credentials to overseas customers. REGO will work alongside the existing renewable obligation certificates (ROCs), but unlike ROCs it will apply to large-scale hydro and electricity from waste. It will be administered by regulator Ofgem.