The Organization Act of National Fire Agency, Ministry of the Interior Article 13

Pursuant to Article 8 of Public Service Appointment Procedure, with the exception of police officials, any and all personnel specified with particular job ranks or official ranks in Articles 6 through 10 shall be selected from related job systems.
中文原文 內政部消防署組織條例第13條
第六條至第十條所定列有官等、職等人員,除警察官外,其職務所適用之職系,依公務人員任用法第八條之規定,就有關職系選用之。

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