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The Chilean Antarctic Territory, or Chilean Antarctica, is a part of West Antarctica and nearby islands claimed by Chile. It comprises the region south of 60°S latitude and between longitudes 53°W and 90°W, partially overlapping the Antarctic claims of Argentina and the United Kingdom. It constitutes the Antártica commune of Chile. The territory covers the South Shetland Islands, the Antarctic Peninsula, and the adjacent islands of Alexander Island, Charcot Island and Ellsworth Land, among others. Its boundaries are defined by Decree 1747, issued on November 6, 1940, and published on June 21, 1955, by the Ministry of Foreign Affairs: The commune of Antártica has an area of 1,250,257.6 km2. If reckoned as Chilean national territory, it comprises 62.28% of the total area of the country. It is managed by the municipality of Cabo de Hornos with a seat in Puerto Williams in the Tierra del Fuego archipelago. It belongs to the province of Antártica Chilena, which itself is a part of the region of Magallanes y la Antártica Chilena. The commune was created on July 11, 1961, and was part of the Magallanes Province until 1974, when the Antártica Chilena Province was created. Chilean sovereignty over the Chilean Antarctic Territory is exercised in conformity with the Antarctic Treaty of 1959. This treaty established that Antarctic activities are to be devoted exclusively to peaceful purposes by the signatories and acceding countries, thereby freezing territorial disputes and preventing the construction of new claims or the expansion of existing ones. The Chilean Antarctic Territory corresponds geographically to time zones UTC-4, UTC-5, and UTC-6, but as with Magallanes it uses UTC-3 year-round. Chile currently has 13 active Antarctic bases: 4 permanent, 5 seasonal, and 4 shelters.