Explanatory notes
… gold, platinum, iridium, osmium, palladium, rhodium and ruthenium). (2) The metallurgical base metals referred to … as appropriate by application of General Interpretative Rule 3 (b) or failing that by application of Rule 3 (c). … metals of heading 28.05 (i.e., lithium, sodium, potassium, rubidium, caesium, calcium, strontium and barium); such …