Maritime Act Article 132

If the ship in which the cargo is to be loaded has not been determined at the time of making the contract of insurance, the purchaser or insured shall, when he becomes aware that such cargo having been loaded on a ship, without delay despatch notice to the insurer of the name of the ship, the date of loading, the cargo being loaded and its value. If no such notice was despatched, the insurer would not be liable for any damages resulted therefore.
中文原文 海商法第132條
未確定裝運船舶之貨物保險,要保人或被保險人於知其已裝載於船舶時,應將該船舶之名稱、裝船日期、所裝貨物及其價值,立即通知於保險人。
不為通知者,保險人對未為通知所生之損害,不負賠償責任。

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