AA 4
CAP. 59]
[Subsidiary]
Application of this Part.
Safety precautions.
[1986 Ed.
(iii) that adequate steps will be taken to ensure that the benzidine hydrochlorides are, at all times, except while they are in the totally enclosed system, kept wet so that the proportion by weight of water to benzidine hydrochlorides is not less than one part of water to two parts of benzidine hydrochlorides,
and if he is further satisfied in each of the cases mentioned in sub-paragraphs (a), (b) and (c) that the requirements of regulations 6 to 9 will be complied with in the case of any manufacture or use (as the case may be) referred to in those sub-paragraphs as if it were a case to which regulations 6 to 9 apply and as if the references therein to controlled substances included references to prohibited substances.
(2) The Commissioner for Labour may, by notice in writing served on the proprietor of the industrial undertaking concerned, revoke any exemption granted under paragraph (1).
5.
PART III
CONTROLLED SUBSTANCES
Subject to regulation 4, this Part applies only with respect to industrial undertakings in which any person is employed-
(a) in connexion with the manufacture of any controlled substance or in connexion with any process in the course of which any controlled substance is formed;
(b) in connexion with any process in the course of which any controlled substance (other than auramine or magenta) is used or handled;
(c) in the storage or movement within the industrial undertaking of any controlled substance in connexion with any manufacture or process referred to in paragraph (a) or (b);
or
(d) in the maintenance or cleaning of plant or the cleaning of containers, stores or workrooms in connexion with any manufacture or process referred to in paragraph (a) or (b).
6.
The proprietor of every industrial undertaking shall-
(a) take all practicable steps to prevent persons employed therein in any manufacture, process or work referred to in regulation 5 being exposed to the risk of inhaling, ingesting or otherwise absorbing any controlled substance;
(b) warn every person employed therein by posting notices (in the English and Chinese languages, in a form approved by the Commissioner) in conspicuous places where any controlled substance is present and where any such manufacture-
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