23. In regulation 28—
(a)in the heading and in paragraphs (1) to (3), (6) and (8), omit “municipal” in each place where it occurs;
(b)in paragraph (2), for “50 per cent” substitute “10 per cent”;
(c)in paragraph (5), after “accredited RHI installation” insert “or where the installation is a CHP system, by a combustion unit which supplies energy to that installation from solid biomass contained in waste,”;
(d)omit paragraph (9).