Regulations on Terrestrial Television Business Broadcasting Domestically-Produced Programs Article 5
Prime time mentioned in Article 2 refers to eight to ten pm every night.
中文原文 無線電視事業播送本國自製節目管理辦法第5條
第二條所稱主要時段，指每日晚間八時至十時。
English translation for reference only; the Chinese text prevails. Not legal advice.