Industrial Group Act Article 9

Only one industrial trade association of the same trade should be allowed in a district. Exception is given to those that have been established before the adjustment of administrative districts.
中文原文 工業團體法第9條
同一區域內之同業組織工業同業公會,以一會為限。
但於行政區域調整前成立者,不在此限。

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