Cargo Systems Messaging Service - U. S. Customs and Border Protection Welcome to U S Customs and Border Protection’s (CBP’s) Cargo Systems Messaging Service (CSMS) CSMS is one of CBP’s methods for communicating to our trade partners news and updates on our automated systems – namely the Automated Commercial Environment (ACE)
CSMS # 68253075 - GUIDANCE: Section 232 Duties on Imports of Aluminum . . . This guidance provides instructions for importers, brokers, and filers on submitting entries to U S Customs and Border Protection (CBP) on certain steel, aluminum, and copper articles and their derivatives from all countries as provided in HTSUS headings 9903 82 02–9903 82 17