Regulations for Administrating Pilots Article 38

The shipping administration authority may prescribe, depending upon the situation of the local water area, to require that any special vessel or any vessel exceeding a specific tonnage and length shall hire at least two pilots; however, these pilots shall join together to coordinate the piloting without boarding the vessel in different times.
中文原文 引水人管理規則第38條
航政機關得視當地水域情況,規定特種船舶或超過一定噸位、長度之船舶應僱用兩名以上之引水人;該等引水人應會合後協同領航,不得分次登船。

English translation for reference only; the Chinese text prevails. Not legal advice.