These are merchandise subject to special classification provisions, temporary legislation, temporary modifications proclaimed under trade agreements legislation, or other legislation. See chapters 98 and 99 of the U.S. Harmonized Tariff Schedule (https://hts.usitc.gov/current) and chapter 98 of U.S. Schedule B (https://www.census.gov/foreign-trade/schedules/b/) for more information.
Which HTS 8-digit subheadings are included in each product grouping?