Act for the Establishment and Management of Free trade zones Article 25

Where any tax-free goods, machinery or equipment of a free-trade-zone enterprise needs to be transported to a tax area for repair, test, inspection, and/or commissioned processing, with prior approval of Customs, the tax bonding may be exempted from provided that if the same are returned to the free trade zone within six (6) months since the approval, the pending case may thereafter be closed accordingly. If the same is not returned upon expiration of the six-month deadline, it shall be declared to Customs for supplemental payment of the duty and taxes.Under a special circumstance as approved by Customs via application, the goods transported to a tax area as referred to in the preceding paragraph may be exported directly without having to be returned to the said free trade zone, and the pending case may thereafter be closed accordingly.In the case of the extension of the deadline to return to the free trade zone as referred to in the first paragraph, an application shall be filed with Customs elaborating the causes in writing along with supporting documents and certificates; provided, however, that the extension is subject to a limit of six (6) months.The goods to be transported from a free trade zone to a tax area for exhibition by a free-trade-zone enterprise shall apply to the regulations set forth in the preceding three paragraphs.
中文原文 自由貿易港區設置管理條例第25條
自由港區事業免稅之貨物、機器、設備,因修理、測試、檢驗、委託加工而須輸往課稅區,經向海關申請核准者,得免提供稅款擔保。
但應自核准後六個月內復運回自由港區,並辦理結案手續;屆期未運回自由港區者,應向海關申報補繳稅費。
前項輸往課稅區之貨物,因特殊情形經申請海關核准者,得不運回自由港區逕行出口,並辦理結案手續。
第一項如須延長復運回自由港區之期限者,應於復運期限屆滿前,以書面敘明理由,檢附有關證件,向海關申請展延;其展延,以六個月為限。
自由港區事業免稅之貨物輸往課稅區展覽者,準用前三項規定辦理。

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