Regulations Governing Tariffs for Passengers and Cargo Air Transportation Article 6

A Civil Air Transport Enterprise shall notify CAA for record of its own full passenger fares decided within the range of the approved ceiling and bottom tariffs, rates of cargo and luggage, and surcharges. It shall come into force on the 30th day starting from the date of filing for record. The same procedure applies in the event of changes.
中文原文 航空客貨運價管理辦法第6條
民用航空運輸業於前條交通部核准之上下限範圍內自訂全額客運票價、貨運與行李費率、附加費,應報請民航局備查,並自報請備查日之第三十日起生效;變更時,亦同。

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