1971 Criminal Commutation Act Article 9

Punishments for multiple offenses that have final judgment for commutation and non-commutation shall have sentences determined pursuant to the provisions of Article 3, Article 4, and the preceding Article of this Act for the offenses that deserve commutation, then, together with the non-commuted sentences, have Article 51 of the Criminal Code applied for determining applicable execution terms.
中文原文 中華民國六十年罪犯減刑條例第9條
裁判確定前犯數罪,有應減刑與不應減刑者,就應減刑之罪,依第三條、第四條及前條規定減刑後,與不應減刑之罪之宣告刑,適用刑法第五十一條定其應執行之刑。

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