Pharmaceutical Affairs Act Enforcement Rules Article 6

The term "drug imported without prior approval" in Article 22, subparagraph 2 of the Act means that no drug permit license allowing import has been approved and issued by the central competent health authority in accordance with Article 39 of the Act.
中文原文 藥事法施行細則第6條
本法第二十二條第二款所稱未經核准擅自輸入之藥品,係指該藥品未曾由中央衛生主管機關依本法第三十九條規定核發輸入許可證者。

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