Parliament is supreme in the sense that it can pass legislation that is inconsistent with any international treaty obligation which, nevertheless, continues to bind the United Kingdom at the international level. Only very occasionally have matters of international law arose for judicial review in England. There is no Crown prerogative that will always be correct on international law. It is a matter, which is in principle revisable. To the contrary, an example of an international model is the Constitution of the Netherlands.
International law operates automatically, as such, within the national legal system.
Therefore, certain treaties are considered constitutional law where they limit or extend the powers of Dutch offices based on national constitutional law. Examples of this are the European Convention for the Protection of Human Rights and Fundamental Freedoms and the International Covenant on Civil and Political Rights. The Constitution does not actually state which authority is competent to enter into treaties. From constitutional history, however, it can be drawn that this power rests with the Government. Generally, the Government may not commit the United Kingdom to binding provisions under international law without the approval of the States General.