Regulations Governing Employment Transfer Procedures and Employment Qualifications for Foreigners Engaging in the Jobs Specified in Subparagraph 8 to 11 of Paragraph 1 of Article 46 of the Employment Service Act Article 21

For the employer of consecutive employment or original employer, according to the Guideline, when consecutively employing or transferring foreigners, the same foreigner cannot simultaneously and successively sign the bilateral or trilateral certification documents, or consecutively employ or transfer the foreigner through public employment institutions.
中文原文 外國人受聘僱從事就業服務法第四十六條第一項第八款至第十一款規定工作之轉換雇主或工作程序準則第21條
接續聘僱之雇主或原雇主依本準則接續聘僱或轉出外國人時,不得以同一外國人名額,同時或先後簽署雙方或三方合意接續聘僱證明文件,或至公立就業服務機構接續聘僱或轉出外國人。

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