Attorney Regulation Act Article 51

Attorneys who practice law in law firms and total 30 or above in a juristic district of any district court may establish a local bar association, and designate the judicial district of such court as the region of such association. However, where any other local bar association is founded due to changes to the judicial district of any court in the original region of a local bar association, the latter local bar association should designate the modified judicial district of such court as its region.Attorneys may jointly establish a local bar association in multiple judicial districts of district courts where there is no existing bar association.Multiple bar associations may merge with one another.
中文原文 律師法第51條
每一地方法院轄區設有事務所執業之律師三十人以上者,得成立一地方律師公會,並以成立時該法院轄區為其區域。
但於本法中華民國一百零八年十二月十三日修正之條文施行前,地方律師公會原組織區域內,已因法院轄區異動而成立其他地方律師公會者,以異動後之法院轄區為其區域。
無地方律師公會之數地方法院轄區內,得共同成立一地方律師公會。
數地方律師公會得合併之。

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