Psychologists Act Article 49

The territorial areas of clinical psychologist guilds or counseling psychologist guilds are the existing administrative areas. There shall be no more than one guild of the same level in the same area.
中文原文 心理師法第49條
臨床心理師公會或諮商心理師公會之區域,依現有之行政區域;在同一區域內,同級之公會以一個為限。

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