In the case of any credit card account under an open end consumer credit plan, no creditor may increase any annual percentage rate, fee, or finance charge applicable to any outstanding balance, except as permitted under subsection (b).
The creditor shall not change the terms governing the repayment of any outstanding balance, except that the creditor may provide the obligor with one of the methods described in paragraph (2) of repaying any outstanding balance, or a method that is no less beneficial to the obligor than one of those methods.
For purposes of this section, the term “outstanding balance” means the amount owed on a credit card account under an open end consumer credit plan as of the end of the 14th day after the date on which the creditor provides notice of an increase in the annual percentage rate, fee, or finance charge in accordance with section 1637(i) of this title.