Pos. 2930 (organiske svovlforbindelser) og pos. 2931 (andre uorganiske/organiske forbindelser) omfatter ikke sulfo- eller halogenderivater (herunder sammensatte derivater), der bortset fra hydrogen, oxygen og nitrogen kun indeholder sådanne svovl- eller halogenatomer med direkte binding til carbon, der giver forbindelserne karakter af sulfo- eller halogenderivater (eller sammensatte derivater).
Heading 2930 (organo-sulphur compounds) and heading 2931 (other organo-inorganic compounds) do not include sulphonated or halogenated derivatives (including compound derivatives) which, apart from hydrogen, oxygen and nitrogen, only have directly linked to carbon the atoms of sulphur or of a halogen which give them their nature of sulphonated or halogenated derivatives (or compound derivatives).