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National Measurement Institute

Legal Metrology

Legal metrology comprises all measurements carried out for any legal purpose and includes measurements that are subject to regulation by law or government decree. It has its historical origins in the need to ensure fair trade, but also includes measurements in areas such as health and safety.

Note about Speed Measuring Instruments:
The regulation of traffic speed is an activity that comes under State/Territory law and it is carried out by traffic regulators in each State/Territory. There is no requirement for speed cameras, radar, lidar or other speed measuring instruments/devices to be pattern approved under the National Measurement Act and its Regulations and this legislation does not prescribe any specific requirements for these instruments.

NMI is responsible for developing and harmonising legal metrology at a national, international and regional level. To achieve this, NMI is committed to effective consultation and we invite you to participate in the consultative process.

Click here for details of some of our recent consultations.

Regulatory Reform: Have Your Say

We are seeking your feedback to determine an effective approach to regulation reform that best reflects the needs of individuals, businesses and the community.

National Framework

The national measurement system is a coherent formal system which ensures that measurements can be made on a consistent basis throughout the country. To support the needs of the national measurement system, NMI:

NMI also runs seminars for legal metrology officers.

International Framework

NMI represents Australia at the International Organisation of Legal Metrology (OIML), an intergovernmental organisation dedicated to harmonising legal metrology procedures. Click here for details of NMI's involvement in OIML activities.

Regional Framework

The Asia–Pacific Legal Metrology Forum (APLMF) was established in 1994 to develop legal metrology and the promotion of free and open trade in the Asia Pacific. NMI (representing Australia) provided the presidency and secretariat from then until 2002. Membership consists of twenty full member and six corresponding member economies. NMI currently has membership on the executive committee and chairs the working group on training.