The following radioactive materials cannot be transported by aircraft to, from or over Canada without prior authorization.
| Nuclear Substance | Form | Quantity |
|---|---|---|
| Plutonium1 | Unirradiated | More than 15 g |
| Uranium 235 | Unirradiated - uranium enriched to 20% 235U or more | More than 15 g |
| Uranium 235 | Unirradiated - uranium enriched to 10% 235U or more, but less than 20% 235U | More than 1 kg |
| Uranium 235 | Unirradiated - uranium enriched above natural, but less than 10%235U | 10 kg |
| Uranium 233 | Unirradiated | More than 15 g |
| Fuel consisting of depleted or natural uranium, thorium or low-enriched fuel (less than 10% fissile content) | Irradiated | More than 15 g |
1All plutonium except that with isotopic concentration exceeding 80% in plutonium 238.