Regulations Governing Customs Bonded Factories Article 5-1

For factories that have been approved for registration by the competent authority or newly established factories that have applied for registration with the competent authority, before applying to Customs for registration as a Bonded Factory, they may submit the factory registration number or the relevant documents of the factory registration application certificate and apply to Customs to dispatch personnel to provide on-site guidance in the establishment of bonded factories.
中文原文 海關管理保稅工廠辦法第5-1條
經主管機關核准登記之工廠或已向主管機關提出申請登記之新設工廠,於向海關申請登記為保稅工廠前,得檢送工廠登記編號或工廠登記申請證明之有關文件,向海關申請派員實地輔導保稅工廠之設立。

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