PART 331—FEDERAL INTEREST RATE AUTHORITY Authority: 12 U.S.C. 1819(a)(Tenth), 1820(g), 1831d. Source: 85 FR 44157, July 22, 2020, unless otherwise noted. § 331.1 Authority, purpose, and scope. (a) Authority. (b) Purpose. (c) Scope. § 331.2 Definitions. For purposes of this part— Home State Host State Insured branch Interest Out-of-State State bank Rate on 90-day commercial paper State bank § 331.3 Application of host State law. The laws of a host State shall apply to any branch in the host State of an out-of-State State bank to the same extent as such State laws apply to a branch in the host State of an out-of-State national bank. To the extent host State law is inapplicable to a branch of an out-of-State State bank in such host State pursuant to the preceding sentence, home State law shall apply to such branch. § 331.4 Interest rate authority. (a) Interest rates. (b) Classes of institutions and loans. (c) Effect on State law definitions of interest. interest interest (d) Corporate borrowers. (e) Determination of interest permissible under section 27.