Regulations Governing the Banking Activity and the Establishment and the Investment by Financial Institution Between the Taiwan Area and the Mainland Area Article 30

When a third-area subsidiary bank intends to establish a sub-branch under its branch in Mainland Area, its Taiwan parent company shall report to the Competent Authority in advance for recordation before applying to [the financial authority] in Mainland Area. The preceding provision applies to the closure of a sub-branch in Mainland Area. Before a sub-branch commences business, the Taiwan parent company shall submit the documents set out in Paragraph 4 of the preceding article to the Competent Authority for recordation.
中文原文 臺灣地區與大陸地區金融業務往來及投資許可管理辦法第30條
第三地區子銀行在大陸地區分行增設支行,臺灣地區母公司應事先報主管機關備查後,始得向大陸地區提出申請。
支行裁撤時,亦同。
支行開業前,臺灣地區母公司應檢附前條第四項各款資料報主管機關備查。

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