You will require this licence if you intend to import, export or manufacture:
- chlorofluorocarbons (CFCs)
- methyl chloroform
- carbon tetrachloride
- bromochloromethane (BCM).
These substances are classed as banned ozone depleting substances and are only approved for particular uses.
An essential uses licence can only be granted if the substance is intended for laboratory and analytical uses (Annex IV of the Montreal Protocol outlines the approved uses).