The following FAQ came with my NIP. Is this 100% accurate?

Q. How can you prove the camera is accurate?

A. All equipment is tested and operated in accordance with the manufacturer's instructions on every occasion it is used. A calibration certificate is renewed annually in accordance with Home Office regulations. This forms part of police evidence and can only be produced in court.
Calibrated annually?

And the certificate can only be produced in court?

Are these statements correct?

Q. I'm not sure who was driving at the time, what can i do?

A. It is the responsibility of the registered keeper to provide the full name and address of the driver at the time of the offence. Failure to provide this information will result in a court summons.

What happened to due diligence?