Development of National Languages Act Article 12
The competent authority of special municipalities , counties, and cities shall consider the needs of their respective populaces and, with the passage of a related resolution by the local legislative body, determine which national languages shall be used. It shall also draft measures protecting their use.
中文原文 國家語言發展法第12條
直轄市、縣（市）主管機關得視所轄族群聚集之需求，經該地方立法機關議決後，指定特定國家語言為區域通行語之一，並訂定其使用保障事項。