Statute of Progressive Execution of Penalty Article 27
Prisoners rated Level 2 or higher shall be placed in communal areas during daytime but confined in solitary cells at night.
中文原文 行刑累進處遇條例第27條
第二級以上之受刑人，晝間應雜居監禁，夜間得獨居監禁。
English translation for reference only; the Chinese text prevails. Not legal advice.