Tariff classification change: expands covered precious metals to include silver and platinum and redefines chapter reference. Amendment expands the notification's material scope by substituting 'gold' with 'gold, silver or platinum'; replaces the opening paragraph's reference from 'heading 7108' to 'Chapter 71'; and substitutes Explanation clause (d) to define 'Chapter' as the heading in the First Schedule to the Customs Tariff Act, 1975.