9.—(1) In this article and articles 6, 8 and 15 and in Schedule 3–
(a)“fossil fuel” means–
(i)coal, lignite, natural gas (as defined in the Energy Act 1976(1)) or crude liquid petroleum; and
(ii)anything which is derived directly or indirectly from any of the substances referred to in paragraph (i) which (except as mentioned below) is created for the purpose of being used as a fuel,
other than anything (not being a liquid comprised wholly or mainly of hydrocarbon compounds), which is or is derived directly or indirectly from any of the substances referred to in paragraph (i), which is waste or a component of biomass; and for the purposes of paragraph (ii) a liquid comprised wholly or mainly of hydrocarbon compounds need not be created for the purpose of being used as a fuel;
(b)“waste” is to be regarded as including anything derived directly or indirectly from waste (as that term is defined in article 2(1)); and
(c)“standby generation” means the generation of electricity by equipment which is not used frequently or regularly to generate electricity and where all the electricity generated by that equipment is used by the generating station.
(2) In articles 6, 8 and 15 and in Schedule 3, in determining whether a generating station is fuelled by a particular fuel regard is to be had only to fuel which it uses to generate electricity.
(3) For the purposes of articles 6, 8 and 15 and Schedule 3, fossil fuel or waste which a generating station uses for–
(a)the ignition of gases of low or variable calorific value; or
(b)the heating of the combustion system to its normal operating temperature or the maintenance of that temperature; or
(c)emission control; or
(d)standby generation or the testing of standby generation capacity,
shall only be treated as comprising fuel used to generate electricity in any month in which the combined energy content of the fossil fuel or waste, or both, which the generating station uses for those purposes exceeds 10 per cent of the energy content of the energy sources by which it is fuelled.