A commercial learner’s permit, or CLP, is a driver’s permit that lets you practice driving a commercial vehicle while you’re sitting next to a CDL holder. Simply put, it’s the precursor to getting a commercial driver’s license (CDL), which you’ll need if you want to drive commercial trucks as a career. So if you’re going to get on the path to getting a CDL for truck driving, you’ll first need to apply for your commercial learner’s permit. To do this, you’ll need to have some basic knowledge of commercial driving, which usually means you should attend truck driving school first.