The Armistice Agreement established Demilitarized Zone for cessation ofhostilities in Korea and the paragraph (5) of the agreement put Han River Estuaryunder joint use and allowed right of innocent passage to private vessels carryingresidents near the river. However, there were hardly any private vessels sailing at Han River Estuarydespite the signed agreement and military confrontations ensued in DemilitiarizedZone, Sea Demarcation Line and so forth. As the South attempted to occupyHan River Estuaries during the Korean war, it strongly objected to its joint useuntil Roh government changed its stance and promoted joint development ofthe area for easing inter-Korean tensions and reviving economic cooperation. TheNorth also agreed to the establishment at Inter-Korean Economic CooperationCommittee meetings and South-North Korea Summit in 2007. Although both sides came to an agreement, schemes to develop Han RiverEstuary are progressing slowly due to its relationship with Peace and EconomicCooperation Zone in the West Sea. As reflected in recent disputes over NorthLimit Line (NLL), public opinion in South Korea is against the establishmentof the zone based on NLL. An armistice does not guarantee peace and Han River Estuary is in close proximityto Seoul. As such, two Koreas can undertake the joint development aboveestablishing peace zones in the West Sea and Demilitarized Zone only when theycan build mutual trust that military confrontations will be avoided in all circumstances.