When passing another vehicle a driver should wait until the entire car just passed is visible in rear view mirror before turning back into right hand lane?

No, that's not quite accurate. While seeing the entirety of the other car in your rearview mirror is a good indicator, it's not the definitive rule for safely returning to the right lane after passing. A safer guideline is to ensure you have enough space and can merge back into the right lane *without* interfering with the flow of traffic and having sufficient distance from the overtaken vehicle. Seeing only a portion of the passed car in your mirror, but having ample space and safe road conditions, can be enough.