O.T.S. Astracon - otsusa.com US Reinstates Certain Exclusions from China Section 301 Tariffs. March 28, 2022. The Office of the United States Trade Representative announced its determination to reinstate ... (read more) US Reinstates Certain Exclusions from China Section 301 Tariffs. March 28, 2022. The Office of the United States Trade Representative announced its determination to reinstate ... (read more)