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The principle that in the UK, Parliament is the ultimate and unchallengeable source of all legislation (rather than, for example, royal prerogative). This principle has its origins in the Bill of Rights and Act of Settlement (1700), which forced Parliamentary control on a reluctant monarchy. The modern view of Parliamentary supremacy has largely been shaped by the writings of John Austin, who considered Parliament to be the supreme rule-giver, with no legal limitations on its authority. In fact, there have been in recent years significant challenges to the notion of Parliamentary supremacy, particularly with the advent of EC (now EU) legislation in the 1970s.