Paragraph 9
Any premises at which there are in process, manufacture, use or storage at any one time, or there are facilities provided for such processing, manufacture, use or storage of, quantities of any of the materials listed below in, or in excess of, the quantities specified—
| Phosgene | 5 tonnes |
| Ethylene oxide | 20 tonnes |
| Carbon disulphide | 50 tonnes |
| Acrylonitrile | 50 tonnes |
| Hydrogen cyanide | 50 tonnes |
| Ethylene | 100 tonnes |
| Propylene | 100 tonnes |
| Any highly flammable liquid not otherwise specified | 4,000 tonnes |