US customs and trade news: March 2025

News in brief: summary (harmonised tariff threat schedule) of recent tariff-related developments in the US; tariffs on steel and aluminium have come into force; new tariffs on imports of automobiles and certain automotive parts; amendment to tariffs on Canadian and Mexican goods; tariffs on countries importing Venezuelan oil; amendment to tariffs addressing the synthetic opioid supply chain in China; investigation into imports of timber, lumber and their derivative products; 2025 Trade Policy Agenda introduced.