The Board is amending Regulation Z, which implements the Truth in Lending Act, and the staff commentary to the regulation in order to implement provisions of the Credit Card Accountability Responsibility and Disclosure Act of 2009 that are effective on February 22, 2010. The rule establishes a number of new substantive and disclosure requirements to establish fair and transparent practices pertaining to open-end consumer credit plans, including credit card accounts. In particular, the rule limits the application of increased rates to existing credit card balances, requires credit card issuers to consider a consumer's ability to make the required payments, establishes special requirements for extensions of credit to consumers who are under the age of 21, and limits the assessment of fees for exceeding the credit limit on a credit card account.