Customs Personnel Management Act Article 11

The incumbent certified staff of Directorate General of Customs and its subordinate organizations who have been recruited before the promulgation of this Act shall be reassigned, and the pay rate thereof shall be switched pursuant to the incumbent positions if possessing the statutory appointment qualifications stated in Articles 5 and 8 of this Act; the Examination Yuan shall hold examinations within a limited time period for those who don’t have the statutory appointment qualifications; the regulations governing the examination shall be promulgated by the Examination Yuan. Those who have not passed the qualification examination may remain in the current position until they leave the organization.The regulations governing the reassignment and the switch of pay rate shall be promulgated by the Examination Yuan along with the Executive Yuan.
中文原文 關務人員人事條例第11條
本條例施行前,已進用之關稅總局暨所屬機關編制內現職人員,具有第五條及第八條之法定任用資格者,依現職改任換敘;未具法定任用資格者,由考試院限期辦理考試,以定其資格;其考試辦法,由考試院定之。
未經考試及格者,得繼續任原列職務官稱至離職為止。
前項改任換敘辦法由考試院會同行政院定之。

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