Regulations on the Centralized Issuance of Weather Forecasts and Warnings Article 10
The CWB shall issue information of a typhoon in a timely way, when it moved into the area of latitude 10~30 degrees North, and longitude 105~180 degrees East.
中文原文 氣象預報警報統一發布辦法第10條
颱風進入北緯十度至三十度、東經一百零五度至一百八十度之範圍內時，中央氣象局應適時發布颱風動態。