What will happen if I remain a nonexcepted interstate driver, but fail to renew my Medical Examiner's Certificate?
The Iowa DOT is required to downgrade your CDL to a noncommercial privilege. This downgrade will happen after advance notice. However, the Commercial Driver's License Information System (CDLIS) will be notified immediately. Your physical qualification status in CDLIS will be changed to “not certified.”

Law enforcement officers routinely check CDLIS, so you could be taken out-of-service if operating in non-excepted interstate commerce with an expired Medical Examiner’s Certificate.

It is important to renew your certificate and provide a copy to the Iowa Department of Transportation before it expires.

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1. Who needs to certify their Commercial Driver's License (CDL) and how do I certify?
2. How can I change my certification?
3. Where can I get a physical examination?
4. If my chosen medical examiner does not have the appropriate forms, where can the forms be obtained?
5. What will happen if I remain a nonexcepted interstate driver, but fail to renew my Medical Examiner's Certificate?
6. When do farm drivers have to meet physical qualifications?
7. Do I need a CDL?
8. What do I need to get a CDL?
9. Do I need a Commercial Learner's Permit (CLP)?