Customs Act Article 13

I. Where a notice of post-clearance audit is given within six months commencing from the date following the release of the imports and/or exports, Customs may proceed with post-clearance audit against the duty-payer, exporters, and related persons within two years from the date following the aforesaid release. According to the post-clearance audit result, any case in which duty is refundable or receivable shall be notified within three years from the date following the release date.II.Upon proceeding with the post-clearance audit as referred to in the preceding paragraph, Customs may, for the necessity of investigating evidences, request the duty-payer, exporters or related persons to provide records, documents, accounting books and/or relevant files or data bases regarding the imports or exports, ask such relevant persons to go to the office of Customs for inquiry, or designate officers to proceed with an investigation at the premises of such relevant. The investigated person shall not evade, hinder or refuse such an investigation.III.The related person referred to in Paragraph 1 means the enterprise operating the business of customs brokerage, transportation, freight forwarder, storage, express delivery and any other business, groups or persons.IV.Upon proceeding with the post-clearance audit, Customs may request the relevant authorities and/or organizations to provide related information or other documents regarding the imports and/or exports.V.Regulations governing the scope, procedure, required documents and other matters regarding the post-clearance audit shall be prescribed by the MOF.
中文原文 關稅法第13條
海關於進出口貨物放行之翌日起六個月內通知實施事後稽核者,得於進出口貨物放行之翌日起二年內,對納稅義務人、貨物輸出人或其關係人實施之。
依事後稽核結果,如有應退、應補稅款者,應自貨物放行之翌日起三年內為之。
為調查證據之必要,海關執行前項事後稽核,得要求納稅義務人、貨物輸出人或其關係人提供與進出口貨物有關之紀錄、文件、會計帳冊及電腦相關檔案或資料庫等,或通知其至海關辦公處所備詢,或由海關人員至其場所調查;被調查人不得規避、妨礙或拒絕。
第一項所稱關係人,指與進出口貨物有關之報關業、運輸業、承攬業、倉儲業、快遞業及其他企業、團體或個人。
海關執行第一項事後稽核工作,得請求相關機關及機構提供與進出口貨物有關之資料及其他文件。
海關實施事後稽核之範圍、程序、所需文件及其他應遵行事項之辦法,由財政部定之。

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