 Thus the economic argument that formed the basis of the slogan was that while Scotland was part of the United Kingdom, it lacked control over royalties and revenue from the majority of the oil which lay in the Scottish sector of the North Sea.Given that Scotland is not a sovereign state, it has no effective maritime boundaries; and any claims Scotland may assert are subsumed as part of claims made by the United Kingdom.However, due to the existence of two separate legal systems in Great Britain — that of Scots law pertaining to Scotland and English law pertaining to England and Wales — constitutional law in the United Kingdom has provided for the division of the UK sector of the North Sea into specific Scottish and English components.