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World Radiocommunication Conference (WRC) is organized by ITU to review, and, as necessary, revise the Radio Regulations, the international treaty governing the use of the radio-frequency spectrum and the geostationary-satellite and non-geostationary-satellite orbits. It is held every three to four years. Prior to 1993 it was called the World administrative radio conference WARC; in 1992 at an ''Additional Plenipotentiary Conference'' in Geneva the ITU was restructured and later conferences became the WRC.〔(ITU Landmark Dates )〕 In 2015, the ITU plan to announce their decision whether to abolish the leap second. ==Conferences list== *World Radiocommunication Conference 2015 (Geneva, Switzerland, 2-27 November 2015) *World Radiocommunication Conference 2012 (Geneva, Switzerland, 23 January-17 February 2012) *World Radiocommunication Conference 2007 (Geneva, Switzerland, 22 October-16 November 2007) *World Radiocommunication Conference 2003 (Geneva, Switzerland, 9 June-4 July 2003) *World Radiocommunication Conference 2000 (Istanbul, Turkey 8 May-2 June 2000) *World Radiocommunication Conference 1997 (Geneva, Switzerland, 27 October-21 November 1997) *World Radiocommunication Conference 1995 (Geneva, Switzerland, 23 October-17 November 1995) *World Radiocommunication Conference 1993 (Geneva, Switzerland, November 1993) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「World Radiocommunication Conference」の詳細全文を読む スポンサード リンク
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