The Ship Registration Law Article 41
The application for registering an alteration of port of registry shall be made on the application form, attaching the photocopy of the register book issued by the competent authority of the former port of registry.
中文原文 船舶登記法第41條
因變更船籍港而申請登記時，應檢具舊船籍港主管機關所給之登記簿影本，連同申請書一併附送。