Enforcement Rules for the Act Governing Relations between Peoples of the Taiwan Area and the Mainland Area Article 45

Any item seized by the competent authorities pursuant to Article 42 above that is classified as a banned item, contraband, or fishing tool used in illegal fishing or fishing yield from illegal fishing shall be confiscated; any fishing tool, fishing yield or other articles seized on the ground of smearing or concealing vessel names, having no vessel name or refusal to stop for inspection may be confiscated; other seized items not involved in any violation of the law may be returned. However, where the person that possesses the aforesaid item is processed by judicial agency on suspicions of criminal activity, related items of evidence shall be processed as well.
中文原文 臺灣地區與大陸地區人民關係條例施行細則第45條
前條所定主管機關依第四十二條規定扣留之物品,屬違禁、走私物品、用以從事非法漁業行為之漁具或漁獲物者,沒入之;扣留之物品係用以從事漁撈、其他違法行為,或有塗抹、隱蔽船名、無船名、拒絕停船受檢情形而扣留之漁具、漁獲物或其他物品,得沒入之;其餘未涉及違法情事者,得予以發還。
但持有人涉嫌犯罪移送司法機關處理者,其相關證物應併同移送。

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