Brass instruments, fire extinguishers and floor safes sit on a list of 14 products Commerce proposes to pull inside the metals tariffs, and comments close 21 days after publication

Brass-wind musical instruments are on the list. So are their parts and accessories, under HTSUS 9205.10.0000 and 9209.99.4080, alongside fire extinguishers, free-standing floor safes, aluminium powder, welding machine parts and four headings of electric conductor cable.

The Bureau of Industry and Security filed the notice at 8.45 on Tuesday morning, proposing to bring 14 additional derivative articles inside the Section 232 duties on steel, aluminium and copper. Publication is set for 6 August.

The authority is Proclamation 11021 of 2 April 2026, which lets the Commerce Secretary and the Trade Representative add derivative articles whenever they jointly determine that imports of one have increased in a manner that threatens to impair national security, or that they undermine the objectives of the original metals actions. Commerce says the information available to it indicates that these articles tend to be composed predominantly of aluminium, steel or copper by weight.

The rates are not uniform

Most of the 14 would draw the 25 percent rate in clause (3) of Proclamation 11021. Four groups would not.

Self-propelled cranes, mobile lifting frames on tyres and straddle carriers would take the rates in Proclamation 11032 of 1 June, on the ground that they are a type of mobile industrial equipment. Self-loading and self-unloading trailers for agricultural purposes would take 15 percent, as agricultural equipment. Filled steel containers of propane, oxygen and propene would take 50 percent, because the same containers already draw that rate when they arrive empty.

That last group carries the sentence worth reading twice. The 50 percent would fall on the value of the metal container and not on the value of the contents.

Trailers, again

Three of the 14 lines are trailers: tanker trailers and semi-trailers at 8716.31.00, agricultural self-loaders at 8716.20.00, and other trailers and semi-trailers at 8716.40.00. Commerce is proposing a metals tariff on them on national security grounds, under a separate statute and a separate proceeding from the antidumping case now running on truck trailers from Canada and Mexico.

Twenty one days, and the reason it is not longer

The comment period closes 21 days after publication. Commerce asks for information on five points: the metal intensity of the products, whether import volumes undermine national security, whether domestic production can meet domestic demand, the effect on the economy if the products are included, and any other relevant factor.

The notice then says something that a reader of ordinary rulemakings should notice. The Administrative Procedure Act requirements for notice and comment are inapplicable, Commerce states, because the notice involves a military function of the United States under 5 U.S.C. 553(a)(1). The comment period is offered anyway, on the ground that public input may better inform the decision.

One consequence follows directly. Because no comment period is legally required, the Regulatory Flexibility Act analysis is not required either, and the notice records that none has been prepared. Small importers of these lines therefore get no published estimate of what the change would cost them.