CSMS 63846191·Operational·January 22, 2025·View on csms.cbp.gov ↗

Interconnection Security Agreement (ISA) Renewals for Trade Participants

Plain-English explanation

CSMS 63846191 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin (operational), published on January 22, 2025. It carries the official CBP guidance brokers and importers must follow for the topic — "Interconnection Security Agreement (ISA) Renewals for Trade Participants". CSMS messages are the operational layer between Commerce determinations and at-the-border collections: when Commerce publishes a new rate, scope ruling, or instruction, CBP turns it into a CSMS that ACE/ACS systems and brokers act on.

Message body

Full text as published by U.S. Customs and Border Protection

CSMS # 63846191 - Interconnection Security Agreement (ISA) Renewals for Trade Participants U.S. Customs and Border Protection sent this bulletin at 01/22/2025 05:13 PM EST Cargo Systems Messaging Service CSMS # 63846191 - Interconnection Security Agreement (ISA) Renewals for Trade Participants The Interconnection Security Agreement (ISA) documents and formalizes the security interface between Customs and Border Protection (CBP) and external automated systems. In accordance with implementation of the Customs and Border Protection (CBP) Information Systems Security Policy, all trade participants who transmit electronic data directly to CBP's Automated Systems are required to have a signed Interconnection Security Agreement (ISA) on file with CBP. ISAs are valid for three (3) years. Trade participants should plan to submit a renewal six (6) months prior to the expiration date, or when changes occur to the company’s legal name or data origination/physical address, in order to ensure continuity of data connectivity, and to prevent service delays when requesting updates to the data connection. For MQIPT, Lan to Lan, sFTP, DIS/web services users , complete the eISA: https://eisavpn.cbp.gov/ For MPLS/MQ users , complete the MPLS ISA: https://www.cbp.gov/document/guidance/interconnection-security-agreement-mplsmq-users Download the MPLS ISA form, complete the document, and have it digitally signed by a corporate officer of your company. Email the digitally-signed PDF to CBPISA@cbp.dhs.gov . An ISA is not required from a trade participant who files electronic data to CBP's Automated Systems through a Service Center or Value Added Network (VAN), which subsequently transmits the data to CBP on behalf of the trade participant (the obligation to provide an ISA rests with the Service Center or VAN). For questions about completing the ISA process, please contact CBPISA@cbp.dhs.gov . For all other questions, please contact your Client Representative. Update your subscriptions, modify your password or e-mail address, or stop subscriptions at any time on your Subscriber Preferences Page . You will need to use your e-mail address to log in. If you have questions or problems with the subscription service, please contact subscriberhelp.govdelivery.com . This service is provided to you at no charge by U.S. Customs and Border Protection . Privacy Policy | GovDelivery is providing this information on behalf of U.S. Department of Homeland Security, and may not use the information for any other purposes. Powered by Privacy Policy | Cookie Statement | Help

Frequently asked questions

What is CSMS 63846191?

CSMS 63846191 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin titled "Interconnection Security Agreement (ISA) Renewals for Trade Participants". CSMS bulletins are the operational instructions CBP issues to brokers, importers, and ACE filers covering rate changes, system updates, scope guidance, and other day-to-day customs-operations changes.

When was CSMS 63846191 published?

CBP published CSMS 63846191 on January 22, 2025. The bulletin's instructions are typically operative as of the publication date unless the body specifies a different effective date.

Is the CBP CSMS the legally binding instruction?

Yes — for at-the-border filing and entry collection. CSMS messages translate Commerce's Federal Register determinations into operational CBP instructions that ACE/ACS systems and brokers execute. The Federal Register notice is the underlying legal authority; the CSMS is the operational implementation. Both should be read together when reconciling a rate or scope change.

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