US constitutional government is originated from the dualistic democratic architecture, whose biggest feature is decentralization and balance between states and federal government which had arguments on the issue of oil property and exploitation of nearby sea area. At the end of 19th century, the America developed the technology of shallow sea oil drilling. Since then, the coastal states have declared the ownership of seabed resource. On the other hand, the Interior Department insisted the seabed resource beyond 3 sea miles belong to the federal government and any state have no rights to claim the possession and encouraged federal government assumes jurisdiction and control. Finally, a concession made by the states and federal government is a strong evidence of American dualistic democratic architecture.