Enforcement Rules of the Customs Act Article 6

The term " the arrival date of the transportation means " referred to in Article 2, Subparagraph 1,of the Enforcement Rules and Article 16, Paragraph 1 and Article 62, Paragraph 1, of the Act shall refer to:1. For sea cargo, the date on which the vessel arrives at the port of entry and files the import manifest with Customs;2. For air cargo, the date on which the plane arrives at the airport and files the import manifest with Customs;3. For mailed goods, the date on which the post office mails a parcel claim notice or affixes a postage stamp to the parcel delivery order; or4. For transshipment goods, the date on which the means of transportation carrying the imported goods first arrives at the port of discharge and files the import manifest with Customs.
中文原文 關稅法施行細則第6條
第二條第一款及本法第十六條第一項、第六十二條第一項所稱運輸工具進口日,指下列之日:
一、海運貨物,以船舶抵達本國港口,且已向海關遞送進口艙單之日。
二、空運貨物,以飛機抵達本國機場,且已向海關遞送進口艙單之日。
三、郵運貨物,以郵局寄發招領包裹通知之日,或郵局加蓋郵戳於包裹發遞單上之日。
四、轉運貨物,以裝載貨物之運輸工具最初抵達本國卸載口岸,向當地海關遞送進口艙單之日。

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