12 CFR § 226.30
Limitation on rates
November 10, 2020
A creditor shall include in any consumer credit contract secured by a dwelling and subject to the act and this regulation the maximum interest rate that may be imposed during the term of the obligation50 when:
50[Reserved]
(a) In the case of closed-end credit, the annual percentage rate may increase after consummation, or
(b) In the case of open-end credit, the annual percentage rate may increase during the plan.
[75 FR 7818, Feb. 22, 2010]