19 U.S.C. § 4083
(b) Extension If the initial period for any import relief provided under section 4082 of this title is less than 3 years, the President may extend the effective period of any import relief provided under that section, subject to the limitation set forth in subsection (a), if the President determines that—
(Pub. L. 109–53, title III, § 323, , 119 Stat. 493.)
For termination of section by section 107(d) of Pub. L. 109–53, see Effective and Termination Dates note below.
Section effective on the date the Dominican Republic-Central America-United States Free Trade Agreement enters into force () and to cease to have effect on the date the Agreement ceases to be in force with respect to the United States, and, during any period in which a country ceases to be a CAFTA–DR country, to cease to have effect with respect to such country, see section 107 of Pub. L. 109–53, set out as a note under section 4001 of this title.