Regulations on the Management and Supervision of Preshipment Inspections Article 8

When an inspection entity conducts an inspection on the quantity or quality of a commodity, it shall do so according to the standards set out in the agreement between the importer and the exporter. When there are no standards for this specified in their agreement, relevant international standards shall apply.
中文原文 裝運前檢驗監督管理辦法第8條
檢驗機構進行品質及數量之檢驗時,應依出進口人約定之標準;如無約定標準時,應依相關國際標準為之。

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