8. The electricity to which the GBROC relates was not generated by a generating station that in the month to which the GBROC relates was fuelled wholly or partly by waste unless—
(a)the only waste or wastes by which it is fuelled in that month is or are biomass or liquids comprised wholly or mainly of hydrocarbon compounds;
(b)all the waste by which it is fuelled in that month which is not biomass has first been manufactured into fuel which is in either a gaseous or liquid form (or both) by means of plant and equipment using advanced conversion technologies only; or,
(c)the generating station is a qualifying combined heat and power generating station.