Regulations Governing Customs Bonded Factories Article 19

If, due to lack of storage space, a Bonded Factory needs to rent a warehouse outside its business premises, an approval from the supervising Customs shall be obtained. Moreover, the use of an outside warehouse will not be approved by Customs unless:1. the warehouse is strong enough and equipped with the anti-theft system, fire and flood hazard protection system, ventilation and lighting system, and other facilities necessary to ensure the safety of goods stored therein.2. the bonded warehouse operator has submitted a building occupancy license for warehouse or plant, a building ownership certificate, and a land ownership certificate of the outside warehouse issued by the competent authority, together with their photocopies. In addition, if the outside warehouse is to be obtainted by lease. a lease contract and its photocopy, and a letter of agreement from the leasor declaring that the lease contract remains effective for a period of at least six months even though the leasee has lost the bonded warehouse status, allowing the supervising Customs to dispose bonded goods.
中文原文 海關管理保稅工廠辦法第19條
保稅工廠因廠內倉庫不敷存儲,必須租用廠外倉庫時,應符合下列各款條件,並報請監管海關核准後,方可使用:
一、須為堅固之建築,且具有防盜、防火、防水、通風照明及其他確保存貨安全之設施。
二、取具主管機關核發之倉庫或廠房使用執照、建物所有權狀與土地所有權狀及其影本各一份;如係租賃者,應另檢附租賃契約及其影本各一份與建築物所有權人承諾書,載明同意該保稅工廠經廢止其登記時,其保稅物品可無條件繼續存放在廠外倉庫至少六個月,以供監管海關處理保稅物品。

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