26.—(1) For the purposes of determining the renewable output of a qualifying combined heat and power generating station in any month during which it generates electricity from waste (other than waste which constitutes biomass or is used for permitted ancillary purposes or is in the form of a liquid or gaseous fuel produced by means of gasification, pyrolysis or anaerobic digestion), article 25 applies subject to the following modifications.
(2) For paragraph (2)(a)(ii) of article , substitute–
“(ii)D is the energy content of all of the renewable sources used in generating that station's gross output during that month, less the energy content of–
(aa)any fossil fuel from which those renewable sources are in part composed (other than fossil fuel from which a fuel the energy content of which is deducted by virtue of sub-paragraph (bb) or (cc) is in part composed);
(bb)any of those renewable sources which is a liquid fuel produced by means of pyrolysis and which has a gross calorific value when measured at 25 degrees Celsius and 0.1 megapascals at the inlet to the station of less than 10 megajoules per metre cubed;
(cc)except in the case of an excepted generating station, any of those renewable sources which is a gaseous fuel produced by means of gasification or pyrolysis and which has a gross calorific value when measured at 25 degrees Celsius and 0.1 megapascals at the inlet to the station of less than 2 megajoules per metre cubed,
multiplied by the proportion which the qualifying power output of that station bears to its total power output;”.
(3) For paragraph (3)(a) of that article, substitute–
“(a)F is the energy content of the renewable sources used when generating electricity in that way during that month less the energy content of–
(i)any fossil fuel from which those renewable sources are in part composed (other than fossil fuel from which a fuel the energy content of which is deducted by virtue of paragraph (ii) or (iii) is in part composed);
(ii)any of those renewable sources which is a liquid fuel produced by means of pyrolysis and which has a gross calorific value when measured at 25 degrees Celsius and 0.1 megapascals at the inlet to the station of less than 10 megajoules per metre cubed;
(iii)except in the case of an excepted generating station, any of those renewable sources which is a gaseous fuel produced by means of gasification or pyrolysis and which has a gross calorific value when measured at 25 degrees Celsius and 0.1 megapascals at the inlet to the station of less than 2 megajoules per metre cubed; and”.
(4) For paragraph (3)(b) of that article, substitute–
“(b)G is the energy content of all of the renewable sources used in generating that generating station's gross output during that month less the energy content of–
(i)any fossil fuel from which those renewable sources are in part composed (other than fossil fuel from which a fuel the energy content of which is deducted by virtue of paragraph (ii) or (iii) is in part composed);
(ii)any of those renewable sources which is a liquid fuel produced by means of pyrolysis and which has a gross calorific value when measured at 25 degrees Celsius and 0.1 megapascals at the inlet to the station of less than 10 megajoules per metre cubed;
(iii)except in the case of an excepted generating station, any of those renewable sources which is a gaseous fuel produced by means of gasification or pyrolysis and which has a gross calorific value when measured at 25 degrees Celsius and 0.1 megapascals at the inlet to the station of less than 2 megajoules per metre cubed.”.