The signatories agreed to prepare contingency plans and assist one another, on request, in national emergencies, prevention of smuggling, search and rescue, immigration control, fishery protection, customs and excise control, maritime policing duties, protection of off-shore installations, pollution control, national and other disasters and threats to national security.[1] Saint Kitts and Nevis joined following independence in 1983, and Grenada followed two years later after Operation Urgent Fury, a combined U.S. and RSS invasion of the country. The MOU was updated in 1992 and the system acquired juridical status on 5 March 1996 under the Treaty which was signed at St. Georges, Grenada.