Juvenile Justice Act Article 18-9
Where a juvenile court, after receiving a matter via transfer, report or request, deems that relevant evidence or other materials that need to be taken into account in a submission are incomplete, it may specify in writing the parts in which supplemental information is needed or further investigation should be conducted and return or transfer the case file in question to the judicial police agency or other relevant agencies, designating a time limit within which supplemental information shall be submitted or further investigation shall be conducted. The agency to which the said case file is returned or transferred shall make the supplemental submission within the time limit designated by the juvenile court.
中文原文 少年事件處理法第18-9條
少年法院接受移送、報告或請求之事件後，認為有關證據或其他可供參考之資料未完備者，得於收案後以書面敘明應補足或調查之部分，並指定期間將卷證發回或發交司法警察機關或其他相關機關補足或調查；受發回或發交之機關應於限定之期間內補正。