Regulations Governing Licences and Ratings for Airmen Article 112

The privileges of the holders of an air traffic controller certificate shall be annotated with appropriate category of rating and compliance with English language proficiency at Level 4 to 6 for Airman Radiotelephony Communications.Air traffic controller certificate holders shall be familiar with current operational status, and provide or supervise the provision of air traffic control services in compliance with privileges granted by the appropriate ratings.
中文原文 航空人員檢定給證管理規則第112條
飛航管制員檢定證應註明類別及符合民航局訂定之無線電溝通英語專業能力檢定第四級至第六級之等級。
飛航管制員應熟悉作業現況並依所持有檢定證之類別,提供或督導飛航管制服務。

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