When is it legal to use a mobile phone while driving a commercial vehicle?

Using a mobile phone while driving a commercial vehicle is subject to strict regulations to ensure safety on the road. The correct answer highlights that it is legal to use a hands-free device only when the vehicle is not in motion. This rule is in place to minimize distractions while operating a commercial vehicle, which requires a higher level of attention due to the size and weight of the vehicle, as well as the potential risks involved.

Using hands-free devices allows drivers to remain connected while still maintaining focus on their driving responsibilities, provided they are stationary. It's important to remember that regulations aim to reduce the likelihood of accidents that can occur from distracted driving. Therefore, policies are designed to encourage drivers to prioritize safe driving practices above communication, preventing situations that could endanger themselves or others on the road.