The Office of the United States Trade Representative (USTR) increased the duty rate on all of Section 301 List 4, that is parts A and B, by 5%, from 10% to 15%. Altogether, parts A and B of this list will impact 0 billion worth of imports from China. The 15% duty rate will affect List 4A products arriving on or after September 1, and List 4B products arriving on or after December 15. 

Additionally, the USTR proposed a 5% duty increase from 25% to 30% for Lists 1,2, and 3 to impact goods arriving on or after October 1, pending a formal comment period. Per the USTR announcement, the deadline to submit written comments is September 20.