Regulations for Food Labeling Article 8

Packed food shall label contents in metric system and may indicate an error value.The range of allowable negative error shall comply with the relevant regulation of the CNS 12924 Checking the Net Contents of Packaged Foods in the National Standards of the Republic of China (CNS).
中文原文 糧食標示辦法第8條
包裝糧食應以公制標示內容物淨重,並得標示誤差值。
前項淨重之容許負誤差範圍,應符合中華民國國家標準(CNS)一二九二四包裝食品裝量檢驗法之相關規定。

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