What is a Centralised Examination Station (CES)?
A Centralised Examination Station (CES), written Centralized Examination Station in the US, is a privately operated facility designated by US Customs and Border Protection (CBP) where cargo is made available for physical inspection. When CBP selects a shipment for a hands-on exam, the container is trucked from the port or terminal to a CES, unloaded, inspected and reloaded.
Core principle: A CES exam adds both time and cost, and the importer pays for it, even when nothing is wrong with the shipment.
Types of US customs exams
| Exam | What happens | Typical impact |
|---|---|---|
| Non-intrusive (X-ray / VACIS) | The container is scanned without being opened | Shortest delay; may lead to a further exam |
| Tailgate exam | Doors are opened and cargo near the doors is checked | Moderate delay; may take place at a CES |
| Intensive exam | The container is moved to a CES and fully or partly unloaded | Longest delay and highest cost |
Who pays for a CES exam?
The importer is responsible for the costs of a customs exam, including:
- drayage (trucking) to and from the CES
- the CES devanning and handling fee
- storage, demurrage and detention while the container waits
How to reduce exam risk
1. Accurate data
What it is: Correct descriptions, HTS codes, values and parties in the ISF and entry.
Why it matters: Inconsistent data is a common trigger for exams.
2. Consistent shipping patterns
What it is: Established importer and supplier relationships with a clean history.
Why it matters: New importers and new trade lanes are examined more often.
3. Trusted trader programmes
What it is: Programmes such as CBP’s CTPAT, or AEO status in the EU.
Why it matters: Certified traders generally face fewer inspections.
In the EU, physical customs controls take place at border inspection facilities or authorised locations rather than at a CES. Advance data quality, through AMS in the US or ICS2 in the EU, plays a similar role in reducing risk.
Frequently asked questions
How long does a CES exam take?
It varies by port and exam type, from a few days to several weeks at busy ports during peak season.
Can I refuse a customs exam?
No. If CBP selects a shipment for examination, it cannot be released until the exam is complete.
Does an exam mean something is wrong?
Not necessarily. Many exams are random or risk-based and end without any findings.
