Can someone with cdl permit drive with someone with cdl but under 21 in sc?

In South Carolina, a person with a CDL permit can drive a commercial vehicle only when accompanied by a licensed CDL holder who is at least 21 years old. Therefore, if the accompanying driver is under 21, this would not meet the legal requirements for operating a commercial vehicle with a permit. It's important to follow these regulations to ensure safety and compliance with state laws.