Enforcement Rules of the Nationality Act Article 11
Foreign nationals who have applied for naturalization but are not able to submit loss of original nationality certificate within the time limit required by Paragraph 1 of Article 9 of this Act may apply for an extension at least 30 days prior to the deadline along with relevant documents proving he/she has applied to the country of origin for loss of nationality.
中文原文 國籍法施行細則第11條
外國人申請歸化，未能依本法第九條第一項規定於期限內提出喪失原有國籍證明者，至遲應於屆期三十日前檢附已向原屬國申請喪失原有國籍之相關證明文件申請展延。