The Ship Registration Law Article 58

If the deletion of registration involves any third person's interest, the applicant shall submit the letter of consent written by such third person or any other documentary proof.
中文原文 船舶登記法第58條
註銷登記於第三人有利害關係時,申請人應檢具第三人之承諾字據或其他證明文件。

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