The purpose of TILA is to promote the informed use of consumer credit by requiring disclosures about its terms, cost to standardize the manner in which costs associated with borrowing are calculated and disclosed. TILA also gives consumers the right to cancel certain credit transactions that involve a lien on a consumer's principal dwelling, regulates certain credit card practices, and provides a means for fair and timely resolution of credit billing disputes. With the exception of certain high-cost mortgage loans, TILA does not regulate the charges that may be imposed for consumer credit. Rather, it requires uniform or standardized disclosure of costs and charges so that consumers can shop. It also imposes limitations on home equity plans that are subject to the requirements of Sec. 226.5b and certain higher-cost mortgages that are subject to the requirements of Sec. 226.32. The regulation prohibits certain acts or practices in connection with credit secured by a consumer's principal dwelling.