Regulations for the Administration of Hotel Enterprises Article 18-1

Advertisements of hotel enterprises on printed materials, publications, radio, television, electronic signals, the internet, or other media shall specify the hotel enterprise’s registration certificate serial number.
中文原文 旅館業管理規則第18-1條
旅館業以廣告物、出版品、廣播、電視、電子訊號、電腦網路或其他媒體業者,刊登之住宿廣告,應載明旅館業登記證編號。

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