Regulations for Issuing Web Accessibility Accreditation badges for Websites of Governmental Agencies and Schools Article 5

The valid period of the accessible certification label shall be three years.
中文原文 各級機關機構學校網站無障礙檢測及認證標章核發辦法第5條
無障礙認證標章之有效期間為三年。

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