Which authority notified the regulations for ‘Radar equipment for the…

Concept: In India, all legal metrology matters — the standards, certification, and approval of models for instruments used in trade or law enforcement (weighing scales, fuel dispensers, speed-measuring radar equipment, etc.) — are governed under the Legal Metrology Act, 2009, administered by the Department of Consumer Affairs (Ministry of Consumer Affairs, Food and Public Distribution), Government of India.

Application: A vehicle-speed radar device is a measuring instrument used for enforcement purposes, so its approval and regulation fall within this Legal Metrology mandate. Accordingly, the rules governing 'Radar Equipment for the Measurement of Speed of Vehicles' were notified by the Department of Consumer Affairs, publicised in April 2025, coming into force from 1 July 2025.

Cross-check: The other three bodies have distinct, unrelated mandates:

• Defence Research and Development Organisation — the R&D wing of the Ministry of Defence, engaged in developing military hardware, missile systems, and strategic defence technologies for the armed forces.

• Ministry of Home Affairs — administers internal security, central police forces, Union Territory affairs, and coordination of public order between the Centre and States.

• Ministry of Road Transport and Highways — frames national policy on road transport, highway infrastructure, and vehicle/driver regulation under the Motor Vehicles Act.

None of these three carries a statutory role in notifying instrument-approval rules under the Legal Metrology Act — that function belongs to the Department of Consumer Affairs, confirming it as the notifying authority.