The NFFO and SRO were funded by a Fossil Fuel Levy paid by suppliers of electricity from fossil fuels. Updated in 2006, the policies are supposed to reduce CO2 emissions by 15-18% below 1990 levels by 2010 and overall GHG emissions by 23-25%. It is a downstream tax on non-domestic energy use by industry and the public sector, designed to incentivise energy efficiency and emission reductions, with part of the revenue being used to reduce National Insurance contributions.