Regulations Governing the Administration of Shareholder Services of Public Companies Article 16

Where the format of the stock certificates of a public company, as printed and produced when it was not yet a public company, is not in compliance with these Regulations, the company shall print and produce new stock certificates in accordance with these Regulations and replace the old ones with the new ones within six months of the date of approval for its public issuance as a public company.
中文原文 公開發行股票公司股務處理準則第16條
原為非公開發行股票公司,所印製股票與本準則不符合者,應於公開發行核准之日起六個月內,依本準則所定規格重行印製並辦理換發。

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