If your son, daughter, wife, husband or any other policyholder on your cover makes a claim, or a claim is made against them, while they're driving their own car it won't affect any of the other policyholders' No Claims Bonus. However, if they have an accident in your car (which you are policyholder for) then your No Claims Bonus will be affected, but not for the other cars.
For instance, if your automobile is registered in Chennai, the applicable charges for Zone A would be charged. Even if you shift to another town or city, the same charges would be applied. Likewise, if an automobile is registered in a town, Zone B premium charges are applicable. Later on, in case the vehicle own moves to a metro city, he would be charged the rate of the Zone B only
A compulsory car insurance scheme was first introduced in the United Kingdom with the Road Traffic Act 1930. This ensured that all vehicle owners and drivers had to be insured for their liability for injury or death to third parties whilst their vehicle was being used on a public road. Germany enacted similar legislation in 1939 called the "Act on the Implementation of Compulsory Insurance for Motor Vehicle Owners."