Based on the terms of the Taiwan Scholarship programs and ICDF programs, the scholarship award periods must be continuous, with no breaks, and cannot extend. While studying in Taiwan, the scholarship recipients cannot apply to study in another county, regardless exchange or dual/joint degree programs.
MOFA regulations 外交部台灣獎學金要點:
(中文版) 第四點第二項
https://taiwanscholarship.moe.gov.tw/web/file/%E5%A4%96%E4%BA%A4%E9%83%A8%E8%87%BA%E7%81%A3%E7%8D%8E%E5%AD%B8%E9%87%91%E4%BD%9C%E6%A5%AD%E8%A6%81%E9%BB%9E.pdf
(English Version) Article IV.
https://taiwanscholarship.moe.gov.tw/web/file/Guidelines%20for%20the%20MOFA%20Taiwan%20Scholarship%20Program.pdf
MOE regulations 教育部台灣獎學金要點:
(中文版) 第四條第二項第四款
http://edu.law.moe.gov.tw/LawContentDetails.aspx?id=FL030033&KeyWordHL=&StyleType=1
(English Version) Article IV. (ii) 4.
http://edu.law.moe.gov.tw/EngLawContent.aspx?Type=E&id=122&KeyWord=Guidelines
ICDF regulations 國合會獎學金要點:
(English Version)
http://www.icdf.org.tw/ct.asp?xItem=12508&CtNode=30319&mp=2