cdl age requirements
Requirements to Obtain an Original Illinois CLP or Transfer a CDL From Another State. 1  You must be age 18 to apply for a Commercial Driver's License (CDL) or a Commercial Learner's Permit (CLP) to operate intrastate and age 21 to operate in interstate commerce or to transport passengers. To obtain a CLP, you must possess either a valid Illinois CDL or non-CDL license as a base license.