Regulation 1
| Group | Radionuclides within the Group | Limit in Curies for radionuclides | |
|---|---|---|---|
| in the form of sealed sources | in any other form | ||
| 1 | Radionuclides with A2 values not exceeding 0.01 curie | 200 | 20 |
| 2 | Radionuclides with A2 values exceeding 0.01 curie and not exceeding 1 curie | 2000 | 200 |
| 3 | Radionuclides with A2 values exceeding 1 curie and not exceeding 100 curies | 50,000 | 5000 |
| 4 | Radionuclides with A2 values exceeding 100 curies | 500,000 | 50,000 |