The constitutional principle that the legislative competence of Parliament is unlimited. No court in the UK can question its power to enact any law that it pleases. In practice, however, Parliament does not assume unlimited authority; it can legislate only for territories that are recognized by international law to be within its competence, i.e. the UK, the Channel Islands and the Isle of Man, and UK Overseas Territories. The Welsh Assembly, Scottish Parliament, and Northern Ireland Assembly have devolved power in certain areas.