| Code | Description | TFR Code | TFR Description | NCA Code | NCA Description |
|---|---|---|---|---|---|
| DYA | Use of Gas D Entonox | 302 | Drugs (including gases) | 7005 | Medical Gases |
| DYB | Use of Gas F Oxygen | 302 | Drugs (including gases) | 7005 | Medical Gases |
| DYC | Cylinders | 302 | Drugs (including gases) | 7005 | Medical Gases |
| DYD | Medical Cylinder Gases | 302 | Drugs (including gases) | 7005 | Medical Gases |
| DYK | Medical Liquid Oxygen | 302 | Drugs (including gases) | 7005 | Medical Gases |
| DYR | Medical Nitric Oxide | 302 | Drugs (including gases) | 7005 | Medical Gases |
| DYV | Medical Gases | 302 | Drugs (including gases) | 7005 | Medical Gases |