Physicians Act Article 7-2

No one not holding a Physician Certificate may be designated the title of Physician. No one not holding a Diplomate Certificate may be designated the title of Diplomate.
中文原文 醫師法第7-2條
非領有醫師證書者,不得使用醫師名稱。
非領有專科醫師證書者,不得使用專科醫師名稱。

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