The Centre on Monday asked all states to link emission test data of vehicles with Vahan database.
"It is requested that all the PUC (pollution under control) vendors be directed to comply with the guidelines to facilitate electronic uploading of emissions test data to Vahan data base...," the ministry said in an advisory to the states.
It is a necessity of linking all vehicle data with Vahan database to avoid harassment and inconvenience to citizens, said the government in its communication to the states.
"This information should be available to citizens in electronic form also in m-Parivahan and e-Challan platforms for their convenience," it added.
The government has set up a central depository called Vahan to store data relating to all vehicles.
The Road Transport and Highways Ministry had earlier issued a notification for amendment in the rule 115 of the Central Motor Vehicle Rules, 1989 in June, 2018 for linkage of PUC certificate with Vahan database.