HTS 8483.10.10Transmission shafts (including camshafts and crankshafts) and cranks; bearing housings, housed bearings and plain shaft bearings; gears and gearing; ball or roller screws; gear boxes and other speed changers, including torque converters; flywheels and pulleys, including pulley blocks; clutches and shaft couplings (including universal joints); parts thereof:Transmission shafts (including camshafts and crankshafts) and cranks: Camshafts and crankshafts: Designed for use solely or principally with spark-ignition internal combustion piston engines or rotary engines

The steel, aluminum and copper tariff doesn't apply to “Articles provided for in subdivision (c) of U.S. note 16 to this subchapter that do not contain any aluminum, steel, or copper” (HTS 9903.82.01).

The steel, aluminum and copper tariff doesn't apply to “Except for articles classifiable in chapters 72, 73, 74 or 76, articles where the weight of the applicable metal is less than 15 percent of the weight of the imported article” (HTS 9903.82.03).

The steel, aluminum and copper tariff may not apply. The legal text: “articles that otherwise meet the criteria of subdivisions (c)(vi)–(viii) and (xi) that are motorcycle parts classifiable in chapter 84, 85 or 87 for use in the manufacturing of motorcycles in the United States” (HTS 9903.82.13).

The auto and auto-parts tariff doesn't apply to “all entries of articles classifiable under provisions of the HTSUS enumerated in subdivision (g) of this note or meeting the requirements of subdivision (p) of this note … (ii) that are not parts of passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans, and cargo vans) and light trucks” (HTS 9903.94.06).

The truck and bus tariff doesn't apply to “all entries of articles classifiable under provisions of the HTSUS enumerated in subdivision (i) of this note that are not parts of medium- and heavy-duty vehicles” (HTS 9903.74.11).

Depending on the goods, the auto and auto-parts tariff (HTS 9903.94.05) or the truck and bus tariff (HTS 9903.74.08) applies, never both; the stack shows the auto and auto-parts tariff.

No forced-labor tariff on line 8483.10.1030: the auto and auto-parts tariff (HTS 9903.94.05) covers it instead.

No forced-labor tariff on lines 8483.10.1010, 8483.10.1050: the truck and bus tariff (HTS 9903.74.08) covers them instead.

No steel, aluminum and copper tariff on lines 8483.10.1010, 8483.10.1050: the truck and bus tariff (HTS 9903.74.08) covers them instead.

The steel, aluminum and copper tariff adds 10% where this applies: “For derivative articles provided for in subdivisions (c)(ii), (vi), and (ix), at least 85 percent of the aluminum content of the article must be composed of aluminum that was smelted and cast in the United States. For derivative articles provided for in subdivisions (c)(iv), (vii), (x) and (xi), at least 85 percent of the steel content of the article must be composed of steel that was melted and poured in the United States. For articles provided for in subdivision (c)(viii), at least 85 percent of the copper content of the article must be composed of copper that was smelt and cast in the United States. These requirements are cumulative such that a derivative article in more than one subdivision must satisfy each requirement” (HTS 9903.82.06). Lines 8483.10.1010, 8483.10.1050.

The steel, aluminum and copper tariff is 15% in place of the regular duty where this applies: “parts classifiable in the provisions of subdivision (c)(vi)–(viii) of this note that are in chapters 84, 85, or 87 of the HTSUS that will be used exclusively in the manufacturing of agricultural equipment or fixed industrial equipment provided for in subdivision (c)(ix)–(x) of this note or mobile industrial equipment provided for in subdivision (c)(xi) of this note” (HTS 9903.82.25). Lines 8483.10.1010, 8483.10.1050.