Organic Act for Investigation Bureau, Ministry of Justice Article 14

The Director General, Deputy Directors General and staff of the recommended assignment rank and above of the Bureau are considered judicial police officers defined in Article 229 of the Code of Criminal Procedure during criminal investigations.Directors of field divisions, special agents in charge of field offices, special agents in charge of field stations and staff members of the recommended appointment rank and above of the Bureau in provinces(municipalities) and counties(cities) are considered senior judicial police officers defined in Articles 229 and 230 of the Code of Criminal Procedure during criminal investigations.Staff members of the designed appointment rank at the Bureau and its subordinate agencies are considered junior judicial police officers defined in Article 231 of the Code of Criminal Procedure during criminal investigations.
中文原文 法務部調查局組織法第14條
本局局長、副局長及薦任職以上人員,於執行犯罪調查職務時,視同刑事訴訟法第二百二十九條之司法警察官。
本局所屬省(市)縣(市)調查處、站之調查處處長、調查站主任、工作站主任及薦任職以上人員,於執行犯罪調查職務時,分別視同刑事訴訟法第二百二十九條、第二百三十條之司法警察官。
本局及所屬機關委任職人員,於執行犯罪調查職務時,視同刑事訴訟法第二百三十一條之司法警察。

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