The obligation under one of the five Non-Fossil Fuel Obligation Orders made under section 32 of the Electricity Act 1989 (before its repeal and saving by the Electricity from Non-Fossil Fuel Sources Saving Arrangements Order (SI 2000/2727), being the government’s principle mechanism for promoting renewable electricity before the Renewables Obligation (RO), and for providing support to nuclear energy in the early 1990s. For more information, see Practice note, Renewables Obligation: Predecessor to the RO: Non-Fossil Fuel Obligation.