Alderney Agreement") entered into between the Governments of Alderney and of Guernsey, certain matters have been delegated to Guernsey. These are known as 'the transferred services'. Transferred services include policing, customs and excise, airport operations, health, education, social services, childcare and adoption. (The States of Alderney retains policy control of aviation to and from the island). In return for providing the transferred services Guernsey levies various taxes and duties on Alderney. From 2016 Alderney took back control of Tax on Real Property (TRP). Immigration is the responsibility of the UK (UK law applies), with day-to-day operations carried out by the Guernsey
External relations of Guernsey bodies such as the EU or the OECD. As a result, the crown dependencies work together on areas of mutual interest. For example, in 2000, the three states cooperated on development of common policies for offshore banking. In 2003, they developed a joint approach to certain EU activities around tax information. The heads of government of the crown dependencies, including Isle of Man, Guernsey, Alderney, Sark, and Jersey, meet at an annual "inter-island" summit, to discuss matters of common concern, such as financial regulation and relations with the UK. The relationship of the Crown with Guernsey has been set out