U.S. note 16(f)
(f) Except as provided for in headings 9903.82.12 and 9903.82.17, headings 9903.82.10 and 9903.82.11 apply to articles provided for in subdivisions (c)(ix)–(x) of this note that do not meet the requirements described in subdivision (e) of this note. Headings 9903.82.25 and 9903.82.26 apply to articles that meet the requirements of subdivision (k) of this note but do not meet the requirements described in subdivision (e) of this note. For articles for which the applicable column 1 duty rate is less than 15 percent, heading 9903.82.10 or 9903.82.25 applies and the sum of the column 1 duty rate and the additional ad valorem rate of duty is 15 percent ad valorem . For articles for which the applicable column 1 duty rate is 15 percent or higher, heading 9903.82.11 or 9903.82.26 applies.