9. In regulation 19—E+W
(a)in paragraph (1), for “(2) and (3)”, substitute “ (2), (3) and (4) ”;
(b)in paragraph (3), omit “or a registered exemption”;
(c)after paragraph (3), insert—
“(4) Paragraph (1) applies to the mixing of waste oil—
(a)only to the extent that the prohibition in that paragraph is technically feasible and economically viable; and
(b)only where such mixing would impede the treatment of the waste oil.”.