The Regulations Governing the Implementation of the Imposition of Countervailing and Anti-Dumping Duties Article 3

With respect to a case of the imposition of a countervailing duty or anti-dumping duty (hereinafter referred to as the case), the authority responsible for investigating whether the imported product is subsidized or dumped shall be the MOF; whereas, the authority responsible for investigating whether the subsidized or dumped imported products cause injury to the domestic industry shall be the Ministry of Economic Affairs (hereinafter referred to as the MOEA).The aforesaid investigation for which the MOEA is responsible shall be conducted by its International Trade Commission (hereinafter referred to as the ITC).
中文原文 平衡稅及反傾銷稅課徵實施辦法第3條
平衡稅或反傾銷稅案件(以下簡稱案件)有關進口貨物有無補貼或傾銷之調查,其主管機關為財政部;有關該進口貨物補貼或傾銷有無損害我國產業之調查,其主管機關為經濟部。
經濟部為前項之調查,應交由經濟部貿易調查委員會(以下簡稱貿委會)為之。

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