The Regulations Governing Labor by Prisoners Article 34

The prison shall designate daily external hours for the prisoner for the autonomous external work who may be required to report to the designated premises when necessary.The designated hours specified in the preceding paragraph shall be between 6 am and 9 pm of the same day as determined at the discretion of the prison based on actual needs, unless otherwise agreed by the prison, the cooperative working unit, and the prisoner.Where the situation under the second part of Paragraph 4, Article 31 of the Act is applicable to the prisoner for the autonomous external work, the prison shall report to the supervisory authority, notify the local police department, and transfer the prisoner to the prosecutor authority for investigation.In the event of natural disasters or other unavoidable incidents such that the prisoner for the autonomous external work is unable to make it back to the prison within the designated time period, the prisoner shall report to the prison as soon as possible.After receiving the report from the prisoner as stated in the preceding paragraph, the prison shall designate another returning time for the prisoner while reporting accordingly to the supervisory authority for record.