ANWS has converted its usage of traditional digital codes to IWXXM format, in accordance with ICAO regulations. The conversion involves routine and special weather reports (METAR/SPECI) and Airport Forecast (TAF) in Songshan, Taoyuan, Kaohsiung, Fongnian, Cingcyuangang and Tainan Airports, as well as the Taipei FIR's significant hazardous weather (SIGMET) information. The information transcribed in the new format are then sent to ROBEX for international exchange.