How long must Big City Bank provide notice before increasing its credit card annual fee?

The correct answer is that Big City Bank must provide 30 days' notice before increasing its credit card annual fee. This requirement is in line with regulations enforced by the Credit Card Accountability Responsibility and Disclosure (CARD) Act, which mandates that card issuers notify consumers of changes to the terms of their accounts, including fee increases, a minimum of 30 days before the changes take effect. The intention behind this regulation is to ensure that consumers have adequate notice and the opportunity to consider their options before they incur additional costs, promoting transparency and fairness in credit card practices.