Which of the following best summarises a heavy vehicle driver's personal responsibility under the Chain of Responsibility (CoR)?

1. The driver is responsible only for driving safely; loading is another party's responsibility
2. The driver shares legal responsibility to ensure the overall transport task is conducted safely, including load restraint, fatigue management, and compliance with mass and speed limits
3. The driver has no personal CoR obligations if the transport company has its own safety management system
4. CoR obligations only apply to interstate truck drivers, not to ACT local operators