 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.At the 2015 conference (WRC-15), the ITU deferred their decision on whether to abolish the leap second to 2023.The last World Radiocommunication Conference (WRC-19) took place from 28 October to 22 November 2019 in Sharm el-Sheikh, Egypt.