The Electricity Act Article 83

A Contract Electric Equipment Installer or Electricity Equipment Inspection and Maintenance Enterprise that operates without the required registration is subject to a fine ranging from NT$200,000 to NT$2,000,000 imposed by the competent authority at the level of the Municipal Government or County (City) Government.A Contract Electric Equipment Installer or Electricity Equipment Inspection and Maintenance Enterprise for which the violations described in the preceding paragraph apply may be given a time limit to correct the violation by the competent authority at the level of the Municipal Government or County (City) Government, or ordered to suspend operations if the violation is of serious nature. An Installer or Administrator that fails to correct the violations or suspend operations upon the expiration of the time limit shall be fined consecutively.
中文原文 電業法第83條
未辦理登記而經營電器承裝業或用電設備檢驗維護業者,由直轄市或縣(市)主管機關處新臺幣二十萬元以上二百萬元以下罰鍰。
有前項之情形,直轄市或縣(市)主管機關得通知限期改善,情節重大者並得勒令停止營業;屆期未改善或不停止營業者,得按次處罰。

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