Bailiwick of Guernsey history of the Bailiwick of Guernsey goes back to 933, when the islands came under the control of William Longsword, having been annexed from the Duchy of Brittany by the Duchy of Normandy. The island of Guernsey and the other Channel Islands formed part of the lands of William the Conqueror. In 1204 France conquered mainland Normandy – but not the offshore islands of the bailiwick. The islands represent the last remnants of the medieval Duchy of Normandy. Initially there was one governor, or co-governors working together, of the islands making up the Channel Islands. The title "Governor" has changed
Law of Guernsey of Guernsey) Law, 1973" allowing EU regulations to have immediate effect in Guernsey. Additional effects on Guernsey followed the Treaty of Maastricht,1992, the Treaty of Amsterdam,1997, the Treaty of Nice, 2001 and the Treaty of Lisbon, 2004. Amongst other matters, the Bailiwick has fiscal autonomy, but has accepted European human rights in 1971. Whilst it is a strong constitutional convention that the UK does not normally legislate for the Crown Dependencies without the explicit consent of their Governments, in law it does have the power to do so. This may be done in two ways. Historically, Acts of Parliament might