The Non Polluting Vehicle mark is a mandatory

certification mark A certification mark (or conformity mark) on a commercial product indicates the existence of an accepted product standard or regulation and a claim that the manufacturer has verified compliance with those standards or regulations. The specific ...

required on all new

motor vehicles A motor vehicle, also known as motorized vehicle or automotive vehicle, is a self-propelled land vehicle, commonly wheeled, that does not operate on Track (rail transport), rails (such as trains or trams) and is used for the transportation of pe ...

sold in India. The mark certifies that the motor vehicle conforms to the relevant version of the Bharat Stage emission standards.Sengupta Presentation.
/ref> This certification for a brand new vehicle has a limited validity of 6 months from the date of sale of the vehicle. After this, the vehicle has to be tested afresh. The vehicle is tested in the car companies garage during the years maintenance and a renewed certificate has to be obtained. The certificate thus issued on a used vehicle is the Pollution Under Control certificate. The sticker can be removed after buying the vehicle.

References

{{India certification marks Certification marks in India Environmental certification marks