The Ship Registration Law Article 52

The application, made for registering the proprietorship of a ship having been mortgaged during construction and her port of registry not under the jurisdiction of the competent authority of registering the proprietorship, shall attach the photocopy of the registration of such mortgage and the letter of consent of the mortgagee.
中文原文 船舶登記法第52條
為登記所有權之船舶,如在建造中已有抵押權之登記者,其船籍港不屬於登記抵押權之主管機關管轄時,申請書內應附具登記抵押權之影本及登記抵押權權利人之承諾字據。

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