3.  Schedule 2 to the Act shall be amended as follows:—

(a) in paragraph 4 after sub-paragraph (b), there shall be inserted the following sub-paragraph:—

  

“(bb) where platinum parts exceed 50 per cent. by weight of a whole article, which also contains gold parts of a standard of fineness not less than 750 and where the gold parts are clearly distinguishable in colour from the platinum parts, the platinum parts shall be hallmarked as if they comprised a separate article and the gold parts shall, if it is practicable to strike a mark, be struck with the standard mark for gold only;”;

(b) in paragraph 4(c), for the words “shall be struck only with the standard mark” there shall be substituted the words “shall, if it is practicable to strike a mark, be struck with the standard mark only”; and

(c) in paragraph 6(b)(i), after the word “visible”, there shall be added the words “and the precious metal part is of a thickness of not less than 100 micrometres”.