IMO I637E Manual on Chemical Pollution Section 3 – Legal and Administrative Aspects HNS Incidents, 2015 Edition This publication aims to assist Governments in the implementation of the Protocol on Preparedness, Response and Co-operation to Pollution incidents by Hazardous and Noxious Substances, 2000 (OPRC-HNS Protocol 2000), describing the obligations imposed under the protocol and the means of meeting these obligations. The manual aims to provide the reader, in particular on-scene commanders, response personnel, government entities and others involved in the management and/or response to pollution incidents involving HNS, with a description of the various interests involved in an HNS incident and its aftermath.