6.—(1) The use of a fume cupboard shall not be taken to be an activity falling within Part 1 if it is used as a fume cupboard in a laboratory for research or testing and it is not–
(i)a fume cupboard which is an industrial and continuous production activity enclosure; or
(ii)a fume cupboard in which substances or materials are manufactured.
(2) In sub-paragraph (1) “fume cupboard” has the meaning given by the British Standard ‘Laboratory fume cupboards’ published by the British Standards Institution numbered BS7258 : Part I : 1990.