You should discuss the substance with us, and we will discuss it with the UK government's Department of Energy and Climate Change (DECC). If there is agreement that your substance is suitable, you should draft an HOCNF containing a data set that meets the criteria laid out the preamble to the PLONOR list (preferably in electronic form). References must be given for ecotoxicological data, and a brief supporting justification should be added.
Cefas will review the data to ensure that the criteria for candidate PLONORs are met and that we are satisfied with the data presented. We will then pass our recommendation to DECC, that the chemical is suitable for PLONOR status. If DECC are content, we will register the chemical as a temporary OCNS Group E, covering the period until three months after the next meeting of OIC (or the following meeting, if the chemical is submitted within 20 weeks of the next meeting).
If OIC decide that the candidate substance is not suitable for addition to the PLONOR list, we will notify the supplier. They will be required to submit a full HOCNF data set before a full three-year certification is granted.
The full procedure is described in Mechanism for adding new chemicals to the OSPAR PLONOR list (PDF, 9.10 KB).