The lieutenant governor also exercises certain executive functions relating broadly to citizenship, including involvement with passports, deportation, and nationality.

Despite the loss of Normandy and failure of the First and main Hundred Years' Wars, the situation caused the terms of the 1259 Treaty of Paris to be generally maintained and the Channel Islands were organized separately from the Kingdom of England and its successor states and held directly under the Crown.

[4] Actual administrative control was separately placed with a warden of the isles (custos insularum; gardien des îles), at first typically a member of the king's household knights or the royal council.

[4] This post was given wide autonomy in command and judgment alongside 12 sworn coroners (coronatores juratos) charged to preserve and clarify the local traditions, obligations, and freedoms and some of its holders were greatly enriched by the provision of terra Normannorum, lands seized from previous owners obliged to swear fealty to the Capetian king of France to preserve their other holdings on the Continent.

Following the capture of Mont Orgueil and Jersey's occupation by the French from 1461–1468 owing to the support of Pierre de Brézé, seneschal of Normandy, to the Lancastrian cause of his cousin Margaret of Anjou during the Wars of the Roses, greater attention was paid to the islands' organisation and defense.

A series of rulings by the Privy Council from 1616 to 1618 determined that Jersey's captain would be formally styled its governor but largely restricted to military matters, while the bailiff would exercise most civil and judicial responsibilities without his oversight; Guernsey's officials followed suit shortly thereafter.