Development of National Languages Act Article 16

To provide better services to nationals, individuals being considered for a public service position may, where their duties make it appropriate, submit certification in a national language as part of their qualifications.
中文原文 國家語言發展法第16條
為提供國民適切服務,中央及地方公務人員之甄選得視業務需要,附加國家語言能力證明作為資格條件。

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