30In subsection (2) of that section—
(a)for paragraphs (a) and (b) there is substituted—
“(a)the enforcement notice is quashed on grounds other than those mentioned in paragraph (a) of section 85(1) of this Act;
(b)the enforcement notice is varied (otherwise than on the grounds mentioned in that paragraph) so that any activity the carrying out of which is prohibited by the stop notice ceases to be a relevant activity within the meaning of section 87(2) of this Act;” and
(b)in paragraph (c) the words from “or for its retention” to “granted” are omitted.