Telecommunications Management Act Article 35

Based on the principle of equality and reciprocity, and according to international conventions and agreement, the competent authority may set the individual international roaming service provided by the telecommunications enterprise as a special telecommunications service market and order telecommunications enterprises that provide international roaming services to adopt measures as prescribed in Articles 29 and 33.
中文原文 電信管理法第35條
主管機關依國際條約及協定,基於平等互惠原則,得將電信事業提供之個別國際漫遊服務界定為特定電信服務市場,並命提供國際漫遊服務之電信事業採取第二十九條及第三十三條規定之措施。

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