USMCA
(4) (A) (i) Effective upon the entry into force of the USMCA, the exportation to a USMCA country of merchandise that is fungible with and substituted for imported merchandise, other than merchandise described in paragraphs (1) through (8) of section 4534(a) of this title , shall not constitute an exportation for purposes of paragraph (2). (ii) In this subparagraph, the terms “USMCA” and “USMCA country” have the meanings given those terms in section 4502 of this title . (B) Beginning on January 1, 2015 , the exportation to Chile of merchandise that is fungible with and substituted for imported merchandise, other than merchandise described in paragraphs (1) through (5) of section 203(a) of the United States-Chile Free Trade Agreement Implementation Act, shall not constitute an exportation for purposes of paragraph (2). The preceding sentence shall not be construed to permit the substitution of unused drawback under paragraph (2) of this subsection with respect to merchandise described in paragraph (2) of section 203(a) of the United States-Chile Free Trade Agreement Implementation Act.