by the oldest established salt-pan development in the Caribbean. The variety of species includes a number of endemic species of lizards, snakes, insects and plants, and marine organisms; in addition to being an important breeding area for seabirds. The UK and Turks and Caicos Islands Governments have joint responsibility for the conservation and preservation to meet obligations under international environmental conventions. Due to this significance, the islands are on the United Kingdom's tentative list for future UNESCO World Heritage Sites. Politics The Turks and Caicos Islands are a British Overseas Territory. As a British territory, its sovereign is King Charles III of the United Kingdom, represented by a governor appointed by the monarch, on the advice of the Foreign Office. With the election of the territory's first Chief Minister, J. A. G. S. McCartney, the islands first adopted a constitution on 30 August 1976. The national holiday, Constitution Day, is celebrated annually on 30 August. The territory's legal system is based on English common law, with a small number of laws adopted from Jamaica and the Bahamas. Suffrage is universal for those over 18 years of age. English is the official language. Grand Turk is the administrative and political capital of the Turks and Caicos Islands and Cockburn Town has been the seat of government since 1766. The Turks and Caicos Islands participate in the Caribbean Development Bank, is an associate in CARICOM, a member of the Universal Postal Union and maintains an Interpol sub-bureau. The United Nations Special Committee on Decolonization includes the territory on the United Nations list of non-self-governing territories. Under the new Constitution that came into effect in October 2012, legislative power is held by a unicameral House of Assembly, consisting of 19 seats, 15 elected and four appointed by the governor; of elected members, five are elected at large and 10 from single-member districts for four-year terms. In the 2021 elections the Progressive National Party won in a landslide and Washington Misick became Premier. Administrative divisions The Turks and Caicos Islands are divided into six administrative districts (two in the Turks Islands and four in the Caicos Islands), headed by district commissioners. For the House of Assembly, the Turks and Caicos Islands are divided into 15 electoral districts (four in the Turks Islands and eleven in the Caicos Islands). Judiciary The judicial branch of government is headed by a Supreme Court; appeals are heard by