Regional Workshop on Cooperation Arrangements in the Field of Preparedness and Response to Oil and Hazardous and Noxious Substances (HNS) Spills (MEDEXPOL 2016): Guidelines concerning arrangements which might be made with a view to ensuring, in case of an accident, liaison between the Governmental Authorities and other interested parties, adopted by the Ninth Ordinary Meeting of the Contracting Parties to the Barcelona Convention, Barcelona, 5 - 8 June 1995 (UNEP(OCA)/MED IG.5/16, Annex XII, Appendix IV)