This work will be a useful guide for those who look for rules and practice on the relations between neighboring States in the absence of maritime boundaries. The main question the author is trying to tackle is how to handle the relations between neighboring coastal States when there is no maritime boundary in place. This book attempts to clarify the legal issues of exploitation of oil, gas and fisheries resources, and jurisdictional conflicts with regard to marine scientific research and protection of the marine environment in disputed areas. This book shows numerous instances of provisional arrangements in disputed areas around the globe together with as many as forty-five valuable maps. The author, a scholar and diplomat of Korea, gives an up-to-date and in-depth analysis of the complicated legal issues of maritime delimitation and provisional arrangements in North East Asia. The English texts of the provisional arrangements in the region annexed to the book are also valuable materials.