Regulations Governing Management of Prepackaged Products Article 14

Records related to the sampling test conducted by the dedicated weights and measures authority and its sub-bureaus shall be stored for at least five years.
中文原文 定量包裝商品管理辦法第14條
度量衡專責機關及其所屬分局抽測之相關紀錄,應至少保存五年。

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