US Customs and Border Protection Official US import regulations and tools officialUS customsregulations
EU Customs & Taxation Official EU customs portal for tariffs, procedures and guidance eucustomstariff
China MOFCOM (English) Chinese Ministry of Commerce — trade policy and FTA information ftatariffchina
UK Customs Declaration Service UK's digital customs declaration system for imports ukcustomsdeclaration
EU ICS2 (Import Control System 2) EU import control system — new pre-arrival security filing rules eucustomssecurity