Regulations Governing the Establishment and Management of Bonded Warehouses Article 45

The maximum period of storage of the bonded goods stored in a bonded warehouse is two (2) years, and period is non-extendible. However, this storage deadline limitation does not apply to the raw materials used in important domestic industries, the required daily consumer necessities, the substances or materials for important domestic engineering constructions, or other materials approved by the Customs for special purposes.Where the bonded goods are not declared for importation or returned for re-export within the storage period set forth in the preceding paragraph, a fine for overdue declaration will be imposed according to Paragraph 1, Article 73 of the Customs Act; where bonded goods remain undeclared or unreturned after twenty (20) days elapse since the fine is imposed, the case shall be handled in accordance with Paragraph 2 of the same article.Where the owner of bonded goods or the holder of the cargo manifest issues a written statement to abandon the goods before the expiration of the storage period, the goods shall be disposed of according to Article 96 of the Customs Act.
中文原文 保稅倉庫設立及管理辦法第45條
保稅倉庫存儲之保稅貨物,其存倉期限以二年為限,不得延長。
但如係供應國內重要工業之原料、民生必需之物資、國內重要工程建設之物資或其他具有特殊理由經海關核准者,不在此限。
保稅貨物,如不在前項規定之存倉期間內申報進口或退運出口,自存倉期限屆滿之翌日起,依關稅法第七十三條第一項規定加徵滯報費,滯報費徵滿二十日,仍不申報進口或出口者,準用同條第二項規定處理。
保稅貨物存倉未滿二年,如經所有人或倉單持有人以書面聲明放棄,依關稅法第九十六條規定處理。

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