Aircraft Flight Operation Regulations Article 153

The number and composition of the flight crew shall not be less than those specified in the flight operations manual or operating manual and aircraft flight manual. Flight crew members may be increased or replaced when necessitated by considerations related to the type of aircraft used, the type of operation involved and the duration of flight between points where flight crews are changed.Flight Crew shall operate aircraft in accordance with the procedures, standards and limitations prescribed in operating manuals and aircraft flight manuals without infringement, unless when there is a proper cause necessitating a deviation.The number and composition of the flight crew specified in flight operations manual and operating manual shall not be different, as those have the same specifications.
中文原文 航空器飛航作業管理規則第153條
航空器飛航組員之人數及組成,不得低於航務手冊或操作手冊及飛航手冊之規定。
但得視機型、飛航性質及飛航時間增加或替換之。
飛航組員應依操作手冊及飛航手冊中各項規定、標準及限制操作航空器,不得逾越之。
但有正當理由者,不在此限。
第一項之航務手冊及操作手冊有同一規範時,不得為不同之規定。

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