Same-sex marriage in Guernsey changes to other laws are approved by the States at its meeting on 26 April. On 26 April, the States approved both ordinances, and the law took effect on 2 May 2017. It applies to the jurisdiction of Guernsey, but not to Alderney and Sark. Alderney, one of the three constituent Channel Islands which form the Bailiwick of Guernsey, has full autonomy in most legal matters (except foreign affairs and other powers that have been transferred to the States of Guernsey), through the States of Alderney. Same-sex marriage is legal in Alderney. On 21 February 2017, the States of Alderney's
Alderney From 1612, a Judge was appointed to assist the Governor's administration of Alderney, along with the Jurats. The function of the Judge was similar to that of the Bailiffs of Guernsey and Jersey, and continued until 1949. During the Wars of the Three Kingdoms, Alderney was held by a Parliamentary garrison under Nicholas Ling, Lieutenant-Governor. Ling built Government House (now the Island Hall). The de Carterets of Jersey acquired the governorship, later passing it to Sir Edmund Andros of Guernsey, from whom the Guernsey family of Le Mesurier inherited it, thus establishing a hereditary line of governors that lasted until