What does the NRTA prescribe regarding the use of a cellular phone while driving a motor vehicle on a public road?

1. Drivers may use a hand-held phone if they are traveling below 40 km/h.
2. No person shall drive a vehicle while holding or using a communication device, unless it is secured in a hands-free kit.
3. Cell phone use is only prohibited for commercial truck drivers.
4. Drivers may send text messages but cannot make voice calls.