The Weights and Measures Act Article 11

The decimal multiples and submultiples of legal metrology units shall be expressed and written in the form of the numeral 10 and its positive or negative powers.The names, definitions and symbols of the multiples and submultiples referred to in the preceding Paragraph shall be published per public notice by the competent authority.
中文原文 度量衡法第11條
法定度量衡單位所用之倍數及分數,以十及其正負乘方表示之。
前項倍數、分數之名稱、定義及代號,由主管機關公告之。

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