The UK and France requested that the ICJ determine which country held sovereignty over the islets and rocks in the Minquiers and Écréhous groups. France claimed sovereignty because it fished in the waters and because of its historic sovereignty over the area going back to the Duchy of Normandy in the eleventh century, whilst the UK claimed that Jersey had historically exercised legal and administrative jurisdiction over them.
J.H.W.V. (21 May 2009). "A. G. Roche, The Minquiers and Ecrehos Case (An analysis of the decision of the International Court of Justice).Il Yung Chung, Legal Problems involved in the Corfu Channel Incident, beide uhgegeven in de serie Travaux de juridiction internationale, publiés sous la direction de M. le professeur P. Guggenheim (delen I en III). — Librairie Droz (Genève), Librairie Minard (Paris), resp. 200 en 287 blz.". Netherlands International Law Review. 7 (02): 165. doi:10.1017/s0165070x00032587.