Regulations Governing Institutions Engaging In Credit Card Business Article 49
A card issuer may not hold the supplementary cardholder liable for principal card charges incurred by the principal cardholder.
中文原文 信用卡業務機構管理辦法第49條
發卡機構不得要求附卡持卡人就正卡持卡人使用正卡所生應付帳款負清償責任。