Act for Promotion of Private Participation in Infrastructure Projects Article 12

Unless otherwise specified in this Act, the rights and obligations between the authority-in-charge and the private institution shall be governed by the concession agreement and for matters not specified in the concession agreement, the relevant provisions under the Civil Code shall apply.The parties shall, taking into account protection of the public interest, enter into the concession agreement on a fair and reasonable basis, and shall perform the concession agreement in good faith.
中文原文 促進民間參與公共建設法第12條
主辦機關與民間機構之權利義務,除本法另有規定外,依投資契約之約定;契約無約定者,適用民事法相關之規定。
投資契約之訂定,應以維護公共利益及公平合理為原則;其履行,應依誠實及信用之方法。

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