The Protocol on Preparedness, Response and Co-operation to Pollution Incidents by Hazardous and Noxious Substances, 2000, also known as the OPRC-HNS Protocol, is a framework designed to establish national systems for preparedness and response and to foster international cooperation in the event of major incidents of marine pollution. The protocol was adopted to expand upon the 1990 International Convention on Oil Preparedness, Response and Co-operation and was formally adopted by the States already party to the OPRC Convention. The Protocol serves as an agreement between and a resource for its Parties.
Goal: The goal of the OPRC-HNS Protocol is to enable States to create national plans for the prevention and response to maritime pollution and to provide guidelines for the cooperation between States in the formation of these national plans and the response to any incidents of pollution by hazardous or noxious substances.
Relevant Clauses 
1) Parties undertake, individually or jointly, to take all appropriate measures […] to prepare for and respond to a pollution incidence by hazardous and noxious substances.
3) When the appropriate authorities of a Party learn of a pollution incident, they shall notify other States whose interests are likely to be affected by such incident.
1) Each Party shall establish a national system for responding promptly and effectively to pollution incidents. This system shall include as a minimum:
2) In addition, each Party […] shall establish:
c) detailed plans and communication capabilities for responding to a pollution incident […]
d) a mechanism or arrangement to co-ordinate the response to a pollution incident with, if appropriate, the capabilities to mobilize the necessary resources.
Marine Environment Protection Committee of the International Maritime Organization (2000). Protocol on Preparedness, Response and Co-operation to Polluion Incidents by Hazardous and Noxious Substances, 2000. Retrieved October 10, 2013, from Black Sea MRCC: http://www.bsmrcc.com/files/legal7.pdf