CSMS 46893644·Operational·April 6, 2021·View on csms.cbp.gov ↗

ACE CERTIFICATION Trade Testing Requested after MQ Software upgrade

Plain-English explanation

CSMS 46893644 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin (operational), published on April 6, 2021. It carries the official CBP guidance brokers and importers must follow for the topic — "ACE CERTIFICATION **Trade Testing Requested** after MQ Software upgrade". 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 #46893644 - ACE CERTIFICATION **Trade Testing Requested** after MQ Software upgrade U.S. Customs and Border Protection sent this bulletin at 04/06/2021 06:41 PM EDT Cargo Systems Messaging Service CSMS #46893644 - ACE CERTIFICATION **Trade Testing Requested** after MQ Software upgrade On Monday evening, CBP installed an infrastructure software upgrade in to the ACE Certification environment that will improve the system performance for processing electronic MQ messages in the following ACE areas: ACE Import manifests/bills (all modes of transportation) and associated entry filings. QP/WP In-bonds Entry summary (AE) Add and Replace messages The following ABI message types: Importer/Bond Query (KI/KR) Entry Summary Query (JC/JD) AD/CVD Case Query (AD/AC) Census Warning Override (CW/CO) Census Warning Query (CJ/CL) **Trade partners are encouraged to submit test messages of these types into Certification between now and Friday close of business to ensure proper message sends and receipts of responses. This MQ software upgrade is planned for this weekend, April 10th , to move to the ACE Production environment. 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 46893644?

CSMS 46893644 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin titled "ACE CERTIFICATION **Trade Testing Requested** after MQ Software upgrade". 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 46893644 published?

CBP published CSMS 46893644 on April 6, 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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