Section 401(a), (b) of Pub. L. 91–508 provided that:

“(a) Except as otherwise provided in this section, titles I, II, and III of this Act and the amendments made thereby [enacting this chapter and sections 1730d and 1829b of this title and section 1051 et seq. of former Title 31, Money and Finance, amending section 78g of Title 15, Commerce and Trade, and enacting provisions set out as notes under section 78g of Title 15 and section 1051 of former Title 31] take effect on the first day of the seventh calendar month which begins after the date of enactment [Oct. 26, 1970].

“(b) The Secretary of the Treasury may by regulation provide that any provision of title I or II or any amendment made thereby [enacting this chapter and sections 1730d and 1829b of this title] shall be effective on any date not earlier than the publication of the regulation in the Federal Register and not later than the first day of the thirteenth calendar month which begins after the date of enactment [Oct. 26, 1970].”

Title I of Pub. L. 91–508, title II of Pub. L. 91–508, titles I and II of Pub. L. 91–508, and subchapter II of chapter 53 of Title 31, Money and Finance, have each been popularly known as the “Bank Secrecy Act”. Title I of Pub. L. 91–508, Oct. 26, 1970, 84 Stat. 1114, as amended, enacted this chapter, former section 1730d of this title, and section 1829b of this title. Title II of Pub. L. 91–508, Oct. 26, 1970, 84 Stat. 1118, as amended, also known as the Currency and Foreign Transactions Reporting Act, enacted chapter 21 (§ 1051 et seq.) of former Title 31, Money and Finance, which was repealed and reenacted as subchapter II of chapter 53 of Title 31, Money and Finance, by Pub. L. 97–258, § 4(b), Sept. 13, 1982, 96 Stat. 1067, the first section of which enacted Title 31. For complete classification of Pub. L. 91–508 to the Code, see Tables.