Juvenile Justice Act Article 59

The juvenile court may, when necessary, issue the juvenile a notice and\or companion letter, or request relevant institutes for searching assistance in order to execute the disposition of referral, protective measures or detention for observation.A juvenile protection officer may, if necessary, issue the juvenile a notice to execute protective measures.Article 21, Paragraphs 3 and 4, Article 22, Paragraph 2 and Articles 23 and 23-1 shall apply mutatis mutandis to the notice, companion letter and written request for searching assistance in the two preceding paragraphs.
中文原文 少年事件處理法第59條
少年法院法官因執行轉介處分、保護處分或留置觀察,於必要時,得對少年發通知書、同行書或請有關機關協尋之。
少年保護官因執行保護處分,於必要時得對少年發通知書。
第二十一條第三項、第四項、第二十二條第二項、第二十三條及第二十三條之一規定,於前二項通知書、同行書及協尋書準用之。

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