Regulations Governing the Management of Private Airfields Article 18

If a private airfield voluntarily suspends its operation, it shall notify CAA within fifteen days. The period of such voluntary suspension of operation shall not exceed six months. If the aforesaid suspension goes beyond the time limit, CAA may report to MOTC and re-quest a withdrawal of its license; provided, however, that an application for extension thereof may be granted with good cause shown. The period for such extension shall not exceed six months and the extension shall be limited to onetime only.In case of termination of business or dissolution, the airfield shall notify CAA within fifteen days. CAA will report to MOTC and request a cancellation of its license.
中文原文 民營飛行場管理規則第18條
民營飛行場自行停止營運時,應於十五日內通知民航局。
自行停止營運之期限不得超過六個月,超過者,民航局得報請交通部廢止其許可。
但有正當理由經申請核准延展者,不在此限。
核准延展期限不得逾六個月,並以一次為限。
民營飛行場結束營業或解散時,應於十五日內通知民航局,並由民航局報請交通部廢止其許可。

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