Administrative Regulations on Radio Waves Article 41

Where a fixed station uses more than two radio frequencies, each radio frequency may use the identification signal of that frequency.
中文原文 電波監理業務管理辦法第41條
固定電臺使用二個以上無線電頻率時,每一無線電頻率得使用供該頻率單獨使用之個別識別信號。

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