CSMS 46836540·System update·March 31, 2021·View on csms.cbp.gov ↗

CBP ACE Emergency Maintenance at 4:30pm ET

Plain-English explanation

CSMS 46836540 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin (system update), published on March 31, 2021. It carries the official CBP guidance brokers and importers must follow for the topic — "CBP ACE Emergency Maintenance at 4:30pm ET". 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 #46836540 - CBP ACE Emergency Maintenance at 4:30pm ET 3/31/2021 U.S. Customs and Border Protection sent this bulletin at 03/31/2021 03:12 PM EDT Cargo Systems Messaging Service CSMS #46836540 - CBP ACE Emergency Maintenance at 4:30pm ET 3/31/2021 CBP will perform an emergency maintenance at 4:30pm ET. This maintenance will affect all ACE processing including the ACE Portal. CBP expects this maintenance to last about 3 hours. Another CSMS will be issued when the maintenance has completed. 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 46836540?

CSMS 46836540 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin titled "CBP ACE Emergency Maintenance at 4:30pm ET". 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 46836540 published?

CBP published CSMS 46836540 on March 31, 2021. 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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