The commercial learner's permit

What the permit actually is

49 CFR 383.5 defines a commercial learner's permit as a permit issued by your state of domicile which, when carried with a valid regular driver's license from that same state, lets you operate a class of commercial vehicle while accompanied by a holder of a valid commercial license, for behind-the-wheel training. Two things follow from that sentence.

First, it only works as a pair. 383.25 requires the permit holder to hold a valid driver's license issued by the same jurisdiction that issued the permit, and 383.25 also requires the permit to be a separate document from the license. One without the other is not authority to drive anything.

Second, it is a training document, not a work document. The point of the permit is supervised practice, and the supervision rules are specific rather than general.

The supervision rule is stricter than people expect

383.25 requires the permit holder to be accompanied at all times by the holder of a valid commercial license who has the correct group and endorsements for the vehicle and is otherwise allowed to operate it for that trip. That person has to be physically present in the front seat next to you. In a passenger vehicle, they may sit directly behind you or in the first row behind the driver instead. Either way they must have you under observation and direct supervision.

A commercial license held by someone in the back of a box truck, or someone following in a car, does not satisfy 383.25. Neither does a license for the wrong group. If you are practicing in a combination vehicle, the person beside you needs a Class A.

What you pass to get one

The requirements are listed in 49 CFR 383.71. You must be 18 or older and show proof of age. You must have taken and passed a general knowledge test meeting the federal standard for the vehicle group you expect to drive. You must certify that you are not disqualified under 383.51 and that you do not hold a driver's license from more than one state. You must show proof of citizenship or lawful permanent residency, proof that the state you are applying in is your state of domicile, and the names of every state where you have held any kind of driver's license in the previous 10 years.

The general knowledge test is the one you study for. Its subject list is federal, set out in 49 CFR 383.111, which lists 20 areas every commercial driver must know: vehicle inspection, basic control, shifting, backing, visual search, communication, speed and space management, night operation, extreme driving conditions, hazard perception, emergency maneuvers, skid control, cargo handling, mountain driving and fatigue among them. Work through the general knowledge practice test until you are comfortable across all of it, because that single test is what stands between you and a permit.

The pass mark is 80 percent correct on each knowledge test, set by 49 CFR 383.135. On a fifty-question paper that means forty right.

If the vehicle you will train in has air brakes, add the air brake material as well. 383.111 sets out seven air brake knowledge areas, and 383.95 says that failing the air brake portion means the state must print an air brake restriction on the permit or the license, which bars you from operating any vehicle with air brakes of any type. That restriction lands on the permit, not just on the eventual license, so a failed air brake section can stop the training you were planning. The air brakes practice test covers the same seven areas.

Which endorsements a permit can carry

Most of them cannot go on a permit at all. 49 CFR 383.93 allows exactly three on a commercial learner's permit: passenger, school bus and tank vehicle. 383.25 repeats the list and says all other federal endorsements are prohibited on a permit.

Each of the three comes with a limit while you are still on the permit. With a passenger endorsement you must have passed the passenger knowledge test, and you may not carry passengers other than federal or state auditors and inspectors, test examiners, other trainees, and the licensed driver supervising you. The school bus endorsement works the same way, with the same short list of people allowed on board. With a tank endorsement you may only operate an empty tank, and not one that previously held hazardous materials and has not been purged of residue.

Hazardous materials is out entirely. 383.25 states that a permit holder must not operate a commercial vehicle transporting hazardous materials. The hazmat endorsement also needs a Transportation Security Administration background check, which runs on its own timetable, so it is worth starting that process early even though the endorsement cannot be added until you are licensed.

If you are heading for one of the three permitted endorsements, the knowledge test comes before the permit is issued with that endorsement on it. The passenger practice test, the school bus practice test and the tanker practice test cover those.

The 14-day hold

This is the part worth planning around. 49 CFR 383.25 says a permit holder is not eligible to take the skills test in the first 14 days after the permit is first issued. There is no way to shorten it and no exception in the rule.

Read the wording carefully: the clock starts at initial issuance, not at the date you booked the test and not at the date you finished training. So the earliest useful move is getting the knowledge tests done and the permit in your hand, because the wait runs whether you are training or not.

There is a second requirement stacked on top of the same window. 49 CFR 383.71 requires a person to complete the entry-level driver training prescribed in part 380 before taking the skills test for a Class A or Class B license for the first time. The 14 days and the training are separate hurdles, and finishing one does not cover the other.

How long a permit lasts

49 CFR 383.25 says a permit may be valid for no more than one year from the date it was first issued without the holder retaking the general and endorsement knowledge tests. A permit issued for a shorter period can be renewed, as long as the total stays within that one year from initial issuance.

So you have a fixed window: at least 14 days before the skills test can happen, and at most a year before the written tests expire and you sit them again. Most people have plenty of room in that, but it is worth knowing that drifting for a year costs you the general knowledge test a second time.

One more age rule

The permit age is 18 under 383.71, and that is enough for driving inside a single state. Interstate work is governed separately by 49 CFR 391.11, which requires a driver to be at least 21. It is perfectly normal to hold a permit and then a license at 18 and drive in-state until you turn 21. Check what the job needs before you assume the federal minimum is all that applies.

When you are ready to start, the CDL practice test index lists every knowledge test in one place, and the general knowledge test is the one that gets you the permit.