Regulations Governing Institutions Engaging In Credit Card Business Article 25

A card issuer may not raise the credit limit granted to a cardholder or grants a cardholder a separate credit limit for the cash advance service offered. In addition, the cash advance limits, related marketing activities and other matters shall be carried out in accordance with the provisions stipulated by the Competent Authority.A card issuer may not allow a cardholder to pay the principal and interest of a loan with the credit card it issues.
中文原文 信用卡業務機構管理辦法第25條
發卡機構不得因提供信用卡預借現金功能而提高或另行核給持卡人信用額度,且預借現金額度成數、行銷及相關事宜應依主管機關規定辦理。
發卡機構不得同意持卡人以信用卡作為繳付放款本息之工具。

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