Where more than one danger symbol must be assigned to a preparation the obligation to apply the symbol:
- T shall make the symbols C and X optional unless otherwise specified in Annex I to Directive 67/548/EEC,
- C shall make the symbol X optional,
- E shall make the symbols F and O optional,
- Xn shall make the symbol Xi optional.
The symbol(s) shall be printed in black on an orange-yellow background.
