The Electricity Act Article 21

Electricity Enterprises that intend to undertake mergers and acquisitions, in accordance with the Business Mergers and Acquisitions Act, shall apply to the Electricity Industry Regulatory Agency for written approval by submitting a merger plan jointly written by the parties to the merger, which states the scope of business, assets, liabilities, and the capitalisation of the company after the merger.For a merger above a certain size, the Electricity Industry Regulatory Agency shall work in conjunction with the Fair Trade Commission to review the merger of the Electricity Enterprises, hold public hearings in compliance with the hearing procedure prescribed in the Administrative Procedure Act, and perform administrative investigations and professional assessments within its powers.The size of the merger in the preceding paragraph shall be announced by the Electricity Industry Regulatory Agency.
中文原文 電業法第21條
電業間依企業併購法規定進行併購者,應由擬併購之電業共同檢具併購計畫書,載明併購後之營業項目、資產、負債及其資本額,向電業管制機關申請核發同意文件。
電業管制機關審議一定規模以上併購案,應會同公平交易委員會,審核電業間之併購,並適用行政程序法聽證程序之規定召開聽證會,並得依職權辦理行政調查與專業鑑定事宜。
前項所稱一定規模,由電業管制機關公告之。

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