Regulations Governing Airport Terminal Preparation, Construction, and Operation Article 6

Within 3 years from receiving preparation permission, the applicant is required to present 30 copies of the construction plan to be filed with CAA for MOTC approval. An applicant failing to present the construction plan within the given period may file with CAA for MOTC approval for extension. Each applicant is allowed to apply for extension only once. The extension approved shall be no more than one year.
中文原文 航空站籌設興建及營運管理辦法第6條
申請人應自籌設許可之日起三年內提出興建規劃書三十份申請民航局核轉交通部核准,屆期無法提出者,得申請民航局核轉交通部核准延展;核准延展期限不得逾一年,並以一次為限。

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