Administrative Regulations on Radio Waves Article 5

Radio equipment shall adopt the latest telecommunications technology, and the number and bandwidth of its radio frequency shall be used in the most effective way.
中文原文 電波監理業務管理辦法第5條
無線電設備應採用先進之電信技術,並以最有效率之方式使用無線電頻率數目及頻寬。

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