The Electricity Act Article 45

Electric power generated by Electricity Generating Enterprises may only be sold to a Public Electricity-Retailing Utility or the Electricity Transmission and Distribution Enterprise for Ancillary Services. This restriction does not apply to Renewable Energy-Based Electricity-Generating Enterprises.Renewable Energy-Based Electricity-Generating Enterprises with power lines connecting to the Power Grid may supply electric power to users via wheeling through the Power Grids.Renewable Energy-Based Electricity-Generating Enterprises may install Power Lines for direct supply to users if approved by the Electricity Industry Regulatory Agency.The Electricity Industry Regulatory Agency shall establish rules governing the qualification, prerequisites, required documents, review criteria, and other related matters for Renewable Energy-Based Electricity-Generating Enterprises that apply to engage in direct supply.The provisions in the three preceding paragraphs shall come into effect within one year after the publication of the amendments to this Act on 11 January 2017. The Executive Yuan shall decide the effective date. However, the Electricity Industry Regulatory Agency may review the status of electric power dispatching and request a postponement of the effective date to the Executive Yuan. The postponement may be requested no more than two times. The first postponement shall be limited to one year and the second to six months.
中文原文 電業法第45條
發電業所生產之電能,僅得售予公用售電業,或售予輸配電業作為輔助服務之用。
再生能源發電業,不受此限。
再生能源發電業設置電源線聯結電力網者,得透過電力網轉供電能予用戶。
再生能源發電業經電業管制機關核准者,得設置電源線聯結用戶並直接供電予該用戶。
前項再生能源發電業申請直接供電之資格、條件、應備文件及審查原則及其他相關事項之規則,由電業管制機關定之。
前三項規定,自本法中華民國一百零六年一月十一日修正之條文公布之日起一年內施行,並由行政院定其施行日期。
但經電業管制機關審酌電力調度相關作業後,得報由行政院延後定其施行日期,延後以二次為限,第一次以一年為限;第二次以六個月為限。

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