Sch 4 para 5
Regulations under section 57(6)(b) may modify the emissions limit duty in relation to fossil fuel plant in cases where— (a) the generating station is used for the first time, or permanently ceases to be used, for the generation of electricity, (b) any period during which the emissions limit duty does not apply in relation to the plant by virtue of section 58 begins or ends, or (c) the generating station, or any CCS plant comprised in the fossil fuel plant, is altered.