Administrative Regulations on Amateur Radios Article 34
The occupied bandwidth of an amateur station shall not exceed 10 kHz for working frequencies lower than 29 MHz, and shall not exceed 20 kHz for working frequencies higher than 29 MHz unless otherwise specified in the Technical Specifications for Amateur radio Apparatus.
中文原文 業餘無線電管理辦法第34條
業餘電臺發射之佔用頻帶寬度，於作業頻率未達二九百萬赫時，不得超過十千赫；作業頻率在二九百萬赫以上時，除業餘無線電機技術規範另有規定外，不得超過二十千赫。