Chapter:	59AA	Title:	FACTORIES AND INDUSTRIAL UNDERTAKINGS (CARCINOGENIC SUBSTANCES) REGULATIONS	Gazette Number:
Regulation:	2	Heading:	Interpretation	Version Date:	30/06/1997

In these regulations, unless the context otherwise requires-
"appointed medical practitioner" (指定醫生) means a medical practitioner appointed under regulation 7;
"controlled substance" (受管制物質) means any of the following chemical compounds-

(a) alpha-naphthylamine and its salts (other than alpha- naphthylamine containing, as a by-product of a chemical reaction, more than one per cent of beta-naphthylamine);
(b) ortho-tolidine and its salts;
(c) dianisidine and its salts;
(d) dichlorobenzidine and its salts;
(e) auramine; and
(f) magenta;

(a) beta-naphthylamine and its salts;
(b) benzidine and its salts;
(c) 4-aminodiphenyl and its salts;
(d) 4-nitrodiphenyl and its salts,
and any substance containing all or any one or more of these chemical compounds (other than as a by-product of a chemical reaction and in a total concentration not exceeding one per cent).