While you could be booked for bursting crackers in a silence zone, you could zip through the same area with your vehicle roaring at 90 decibel.
Reason: It is mandatory for all vehicles in the country to keep gas emission below limit, but there is no law to check noise levels.
The main culprits are autorickshaws, trucks and taxis.

Every vehicle owner in India has to obtain a Pollution Under Control (PUC) certificate as per section 115 (2) of the Central Motor Vehicles Act, 1989. But, only gas emission is measured in the PUC check, not the noise level.

The following draft of certain rules further to amend the Central Motor Vehicles Rules, 2989, which the Central Government proposes to make in exercise the powers conferred by section 110 the Motor Vehicles Act, 1988 (59 of 1988), is hereby published as required by sub-section (1) of section 212 of the said Act for information of all persons likely to be affected thereby; and notice is hereby give