Regulations Governing the Prison’s Imposing Punishment on the Prisoner Article 10

For punishment with a given period, the start date of the punishment shall be the date upon the service of the notice of punishment to the prisoner; whereas the end date of the punishment shall be the last day of the given punishment period.
中文原文 監獄對受刑人施以懲罰辦法第10條
懲罰定有期間者,自懲罰書送達受刑人之當日起算;以期間之末日為終止日。

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