Regulations Governing Customs Bonded Factories Article 24

The Bonded Factories shall obtain the prior approval of the competent Customs and under its supervision for conducting the product inspection, testing, repair, maintenance or the operating software installation required for these businesses mentioned above; and the account book for keeping those service record is required to have prior approval and verification stamp from Customs.The imported product referred to in the preceding paragraph shall be re-exported within six months following the next day of its release. However, upon written request with specified reasons, the competent Customs may grant an extension of another six months for re-exportation. Once the product fails to be re-exported within the time limit, a formal entry shall be declared and with payment of duty and taxes to Customs within ten days from the due date.In the case where bonded materials have been used for maintenance of the bonded product referred to in Paragraph 1, the bonded materials and the components used for maintenance shall be listed in a reference table and reported to the competent Customs prior to the product been re-exported or moved out of bonded factory. The bonded materials and components shall not be deducted from the account books if failed, or over the time limit, to be reported to Customs. Where any components disassembled from the product shall be recorded in an exclusive account book, Paragraphs 1 and 2 of Article 44 shall apply mutatis mutandis.
中文原文 海關管理保稅工廠辦法第24條
保稅工廠辦理相關產品之檢驗、測試、修理、維護業務,或安裝該等業務所需之作業軟體,應經監管海關核准及受海關監管;另應設置辦理檢驗、測試、修理、維護貨物之存放專區,並獨立設置維修服務帳冊,報經監管海關核准及驗印。
前項產品為保稅工廠自國外進口者,應於進口放行之翌日起六個月內復運出口,其情形特殊者,得於期限屆滿前以書面敘明理由向監管海關申請延長,延長期間以六個月為限;未於期限屆滿前出口者,應於期限屆滿之翌日起十日內繕具報單補稅。
第一項產品有使用保稅原料維修者,應於該貨物出口(廠)前,向監管海關申報維修貨物裝卸之保稅原料、零組件對照清表備查,逾期或未送備查者不予核實除帳,其拆卸之零組件,應登列專用帳冊控管,並準用第四十四條第一項及第二項規定辦理。

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