The Enforcement Rules of the Ship Registration Law Article 19

The number of the column of "Order of Rights" for a collateral registration shall be the same as for the primary registration thereof. However, the collateral registration number shall be recorded in the column of the primary registration.
中文原文 船舶登記法施行細則第19條
附記登記之權利先後欄,應與主登記之欄數相同。
但應於主登記欄內,記明附記登記之號數。

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