Statute of Progressive Execution of Penalty Article 72
Where prisoners retained to the same level shall disrupt the prison peace and order, the prisoners shall be demoted.
中文原文 行刑累進處遇條例第72條
留級之受刑人，有紊亂秩序之情事者，得予降級。
English translation for reference only; the Chinese text prevails. Not legal advice.