How long must an applicant hold a Commercial Learner’s Permit (CLP) before taking the road test? Do you currently have car insurance? Insurance is mandatory to drive in Ohio Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question How long must an applicant hold a Commercial Learner’s Permit (CLP) before taking the road test? Answers 14 days 30 days 60 days Explanation You must have a Commercial Learner's Permit (CLP) for a minimum of 14 days before you can take the CDL skills test. A CLP will be valid for 180 days.