Operation Regulations in the Event of Natural Disasters and Emergency for Cable Radio and Television System Article 7

After having received the notification of transmission of the message relevant to the natural disaster or emergency from the regulatory agency in charge, the system operator(s) shall insert the transmission of that message truthfully with eye-catching diagrams, electronic effects, subtitles or other significant and effective method. Unless there is further instruction, the transmission of the message shall be inserted at least once every half hour until the reason no longer exists or notification of stopping the transmission of all channels from the regulatory agency in charge.
中文原文 有線廣播電視系統經營者天然災害及緊急事故應變辦法第7條
系統經營者於接獲主管機關指定播送有關天然災害或緊急事故之訊息,應以醒目之圖卡、電子特效、字幕或其他顯著有效方式據實插播。
除另有指定外,至少每半小時應插播一次,至其原因消滅時或主管機關通知停播為止。

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