Enforcement Rules of Weights and Measures Act Article 12

The application for verification mentioned in Article 39 of the Act shall mean that the manufacturer or importer of measuring instruments apply for verification before displaying, selling, installing or using such instruments. However, if the legal measuring instruments can be verified only after they are installed at the place of usage, application for verification shall be filed after such instruments are installed and before they are put in use.
中文原文 度量衡法施行細則第12條
本法第三十九條所稱報請檢定,指製造或輸入業者應於陳列、販賣、安裝或使用前報請檢定。
但法定度量衡器於使用地點安裝後始得辦理檢定者,應於安裝完成後供計量使用前報請檢定。

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