Administrative Regulations on Radio Waves Article 42
Where a broadcasting station uses more than two radio frequencies, each radio frequency may use the call sign used solely for this frequency, or adopt an appropriate identification method, such as reporting its location and used radio frequency.
中文原文 電波監理業務管理辦法第42條
廣播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無線電頻率單獨使用之個別呼號，或以報告地名與所用無線電頻率等適當方式之識別方法。