9. In Article 55(4)—
(a)in sub-paragraph (a) after the words “part of a” insert “process subject to the Industrial Pollution Control Order or”; and
(b)for sub-paragraph (b) substitute—
“(b)of the inspectors appointed under the Industrial Pollution Control Order or, as the case may be, under the Alkali Act, to enforce those provisions in relation to such furnaces.”.