U.S. Code / Title 19 — Customs Duties / Chapter 7—Trade Expansion Program / Subchapter Ii—Trade AgreementsTitle 19PartPart I—General AuthorityContents§ 1821. Basic authority for trade agreements§ 1822. Repealed. Pub. L. 93–618, title VI, §602(d), Jan. 3, 1975, 88 Stat. 2072§ 1823. Waiver of limitation on decrease in duty and negotiation and staging requirements for dicyandiamide and limestone