Who needs to certify their Commercial Driver's License (CDL) and how do I certify?
Federal regulations require all CDL holders and applicants to certify how they operate their commercial motor vehicle whenever they renew, upgrade, or obtain a CDL for the first time.

A CDL holder must certify to one of four categories that apply to the type of driving they do. To learn which category applies to you, visit the Iowa Department of Transportation website.

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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)?