Chunghwa Post Co., Ltd. Establishment Act Article 4

The Company shall be located in the city where the Central R.O.C. Government situates and may, depending on business needs, set up post office branches.
中文原文 中華郵政股份有限公司設置條例第4條
本公司設於中央政府所在地,並得視業務需要分設郵局。

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