Agricultural Production and Certification Act Article 15

Where the operators disagree to the test results, they may apply for a retest to the original sampling authority and pay the retest fees within 15 days upon receiving the notice. The application for retest is limited to one time only.Upon accepting the retest application, the sampling authority shall notify the original testing body to conduct a retest of the original specimen within 7 days. The retest application shall be refused if the specimen has deteriorated or could not be preserved properly.
中文原文 農產品生產及驗證管理法第15條
農產品經營者對於檢驗結果有異議,應於收到通知後十五日內,繳納檢驗費用,向原抽驗機關申請複驗,並以一次為限。
前項受理複驗機關應於七日內通知執行檢驗者就原檢體複驗之。
但檢體已變質或無適當方法可資保存者,不予受理。

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