There is a PUC (Pollution under control) certificate that is required to be current (valid for 6 months) and has to be under the prescribed limit. Traffic cops

There is a PUC (Pollution under control) certificate that is required to be current (valid for 6 months) and has to be under the prescribed limit. Traffic cops check on this regularly. Systems are in place. Vehicles beyond 12 years are being banned. i think assumptions are dangerous.