Maritime Act Article 82

In the event the passenger subscribes an accident insurance policy for himself in addition to the policy referred to in the preceding article, the measure of damages is to be in accordance with such agreement provided that such agreement shall be made in writing.
中文原文 海商法第82條
旅客除前條保險外,自行另加保意外險者,其損害賠償依其約定。
但應以書面為之。

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