Statute of Progressive Execution of Penalty Article 51

Prisoners rated Level 2 or higher shall be allowed to read personal reading materials providing such materials do not violate the disciplinary regulations of the prison. The same shall be true for prisoners rated Level 3 or lower where such privilege shall be essential to the edification and education of the prisoners.
中文原文 行刑累進處遇條例第51條
第二級以上之受刑人,於不違反監獄紀律範圍內,許其閱讀自備之書籍,對於第三級以下之受刑人,於教化上有必要時,亦同。

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