Regulations for Advertising Goods, Labor and General Services of the Mainland Area in the Taiwan Area Article 4

Advertising Activities shall be in traditional Chinese characters, unless simplified characters or labels are originally attached to the Mainland Area goods, labor, general services or other matters.
中文原文 大陸地區物品勞務服務在臺灣地區從事廣告活動管理辦法第4條
廣告活動應以正體字為之。
但為大陸地區物品、勞務、服務或其他事項本身原有之簡體字文字或標示者,不在此限。

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