En ferrolegering betragtes som todelt og tariferes i den relevante underposition (hvis den eksisterer), såfremt blot en af bestanddelene overstiger den minimumsmængde, der er fastsat i bestemmelse 1 c) til dette kapitel; analogt hermed betragtes en legering som tredelt eller firedelt, såfremt to eller tre bestanddele overstiger minimumsmængden.
A ferro-alloy is considered as binary and classified under the relevant subheading (if it exists) if only one of the alloy elements exceeds the minimum percentage laid down in note 1(c) to this chapter; by analogy, it is considered respectively as ternary or quaternary if two or three alloy elements exceed the minimum percentage.