(a) Except as otherwise provided in subsection (b), a bank may amend its credit card agreement with a cardholder by any method permitted therein upon complying with applicable federal disclosure laws, including, but not limited to, by sending a written change-in-terms notice prior to the effective date of the change, if the change-in-terms notice is required by federal law. The agreement, as so amended, may be made applicable to all or any part of the outstanding indebtedness under the plan on or after the effective date of the amendment, including indebtedness arising out of extensions of credit made prior to the amendment.

(b) An amendment that materially increases applicable interest rates or other charges or is otherwise materially adverse to the cardholder shall take effect only if the cardholder consents. If the cardholder does give any required consent, the amendment may be made applicable to all or any part of the outstanding indebtedness under the plan on or after the effective date of the amendment, including indebtedness arising out of extensions of credit made prior to the amendment. If the cardholder does not give any required consent, the cardholder shall be permitted to pay the outstanding unpaid indebtedness in accordance with the terms of the agreement, without giving effect to the amendment, and the bank may terminate any further credit extensions under the plan, unless the credit card agreement provides otherwise.

(c) The cardholder's consent, for purposes of subsection (b), may be expressed by any affirmative act, including, but not limited to, continued usage of the account after a date specified in a change-in-terms or amendment notice sent by the bank. As an alternative, the change-in-terms or amendment notice may require that the cardholder take specified action, such as returning all credit cards and other access devices to the account by a specified date, in which case the cardholder's failure to take action shall be deemed consent by the cardholder to the changed or amended terms.