Regulations Governing Drug Abuse Urine Testing Operations Article 19
Where the confirmatory test results are lower than the limit of quantification set forth in the preceding Article, the urine specimen shall be judged as negative; and the residual specimen shall be disposed in accordance with the provision of article 9.
中文原文 濫用藥物尿液檢驗作業準則第19條
尿液檢體經確認檢驗結果低於前條閾值者，應判定為陰性，其驗餘檢體應依第九條規定處理之。