Exceptional circumstances

Situations involving a considerable health or medical need as acknowledged by the importing and exporting state, situations involving an imminent radiological hazard or security threat presented by one or more radioactive sources, or situations where the exporting facility or exporting state maintains control of the radioactive sources during the period they are outside the exporting state and removes the sources at the conclusion of their use. When the requirements in paragraphs 4e-h cannot be followed with respect to proposed imports or exports of Category 1 and 2 radioactive sources, the imports or exports may be conducted in exceptional circumstances as provided in paragraph 4i.