Hmmm. 8543.70.9960 appears to be under the 1/General 2.6% though... *confused*
*EDIT*: In reading the actual ruling, it should be
2.6%: By application of GRI 1, and Chapter 84 Note 5 (A) and (E), the applicable subheading for the Antminer S9 and DragonMint Miner will be 8543.70.9960, HTSUS, which provides for Electrical machines and apparatus
: Other machines and apparatus: Other: Other: Other: Other. The rate of duty will be 2.6 percent ad valorem.
And here is the most recent chapter85:
https://hts.usitc.gov/view/Chapter%2085?release=2018HTSARevision10Search in that document for 8543.70.99 and look for sub-heading 60 in the table -- rolls up to 8543.70 which is 2.6%.
Something fishy here.