For purposes of this chapter—

(1) Repealed. Pub. L. 93-618, title VI, §602(d), Jan. 3, 1975, 88 Stat. 2072.

(2) The term “duty or other import restriction” includes (A) the rate and form of an import duty, and (B) a limitation, prohibition, charge, and exaction other than duty, imposed on importation or imposed for the regulation of imports.

(3) to (5) Repealed. Pub. L. 93-618, title VI, §602(d), Jan. 3, 1975, 88 Stat. 2072.

(6) The term “modification”, as applied to any duty or other import restriction, includes the elimination of any duty.