Which of the following is NOT a restriction for GDL Class 5 drivers?

The ability for GDL Class 5 drivers to accompany a learner is indeed permitted and serves as a way to foster responsible driving habits while providing guidance to new drivers. This is in line with the GDL program's focus on graduated driving and mentorship. The other options reflect restrictions designed to enhance safety and ensure that GDL drivers are sufficiently prepared before advancing to a full licensing status.

The limit on passengers corresponds to the principle of maintaining a safe and manageable driving environment, while the two-year probationary period is intended to allow for ample experience under less risky conditions. The restriction on re-classifying to a commercial license ensures that GDL drivers first establish a solid foundation in their driving skills before tackling the additional responsibilities associated with commercial driving.