In the case of non-routine movements, an environmental risk assessment shall be carried out as outlined in Annex II. The competent authority shall decide whether the applicant or an independent body is responsible for conducting the environmental risk assessment and who shall bear the cost.

On the basis of the environmental risk assessment, the advisory committee shall give its opinion on the risk to the competent authority, using the summary report form set out in Annex II, Part 3. If the advisory committee finds that the risk is low, the competent authority may grant the permit without further formalities.

If the advisory committee finds that the risk associated with the proposed movement of aquatic organisms is high or medium in the sense of Annex II, part 1, it shall examine the application in consultation with the applicant to see if there are mitigation procedures or technologies available to reduce the level of risk to low. The advisory committee shall forward the results of its examination to the competent authority, detailing the level of risk and specifying the reasons for any reduction in risk, in the form specified in Annex II, Part 3.

The competent authority may only issue permits for non-routine movements in cases where the risk assessment, including any mitigation measures, show a low risk to the environment. Any refusal of a permit must be duly motivated on scientific grounds and, where scientific information is as yet insufficient, on the grounds of the precautionary principle.