It is the responsibility of the fuel pump owner to ensure their pumps are dispensing accurately. Fuel vendors must comply with the National Measurement Act and will have their pumps checked, calibrated and verified by licensed technicians as part of programmed maintenance. The National Measurement Institute (NMI) has overall responsibility for this legislation and its inspectors conduct regular audits throughout Australia on measuring instruments like fuel pumps. They will also follow up on complaints made about fuel delivery volumes. They can be contacted on their hotline number - 1300 686 664, or by email.