Mortgage Lending: § 34.22 Index.
(a) In general. If a national bank makes an ARM loan to which 12 CFR 226.19(b) applies (i.e., the annual percentage rate of a loan may increase after consummation, the term exceeds one year, and the consumer’s principal dwelling secures the indebtedness), the loan documents must specify an index or combination of indices to which changes in the interest rate will be linked. This index must be readily available to, and verifiable by, the borrower and beyond the control of the bank.