Aircraft Flight Operation Regulations Article 51

No person may consume any alcoholic beverage on board except for those served by the operator.An operator shall ensure that no alcoholic beverage is served in its aircraft to the person who:1. Appears to be intoxicated.2. Escorts a person or is under escort.3. Is legally armed.An operator may refuse the boarding of a person who appears to be intoxicated.
中文原文 航空器飛航作業管理規則第51條
任何人於航空器內不得飲用酒精性飲料。
但該飲料係由航空器使用人於餐飲服務時所提供者,不在此限。
航空器使用人不得於其航空器內提供酒精性飲料予下列人員:
一、已顯示醉態者。
二、解送人與被解送人。
三、依規定持械登機之人員。
航空器使用人得拒絕已顯示醉態者登機。

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