Postal Remittances and Savings Act Article 19

There is a limit of one passbook savings account per person or per civic body.Subject to approval by the MOTC, FSC and CBC, Chunghwa Post may set an upper deposit limit for generating interest in passbook savings accounts. Total deposits in excess of the upper limit shall not generate interest.This restriction shall not apply to government agencies, self-governing bodies or non-profit organizations.
中文原文 郵政儲金匯兌法第19條
存簿儲金,每一人或每一團體僅得為一戶。
存簿儲金,儲戶計息之最高存款限額,由中華郵政公司擬訂,報由交通部會同中央銀行及金融監督管理委員會定之;超過限額之數,不給利息。
前項限制,於政府機關、自治團體或公益法人,不適用之。

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