Pursuant to Federal Motor Carrier Safety Administration regulation 383.133, the test for the Commercial Driver's License, CDL, must be administered in English. As of 2016, the CDL test is unavailable in Spanish or any language other than English. Passing the CDL test requires fluency in writing, reading and speaking English.
Potential licensees must be at least 21 years of age, have a valid personal driver's license, and present proof of American citizenship with a Social Security number. If a driver has a prior conviction for operating a motor vehicle under the influence, authorities may prohibit him from taking the test for up to five years.