Hong Kong Regulations

AIR POLLUTION CONTROL (EMISSION REDUCTION DEVICES FOR VEHICLES) REGULATION - SECT 6

Approval of emission reduction devices

(1) An emission reduction device is approved for the purposes of this
Regulation if it is listed in the register.

(2) The Authority may include in the register an emission reduction  device
only if he is satisfied that-

   (a)  the device can reduce the emission of air pollutants from a motor
        vehicle to which this Regulation applies in a manner and to an extent
        satisfactory to the Authority;

   (b)  the device is suitable for installation on a motor vehicle to which
        this Regulation applies; and

   (c)  if the device is to be installed on a class of motor vehicle specified
        in column 1 of Schedule 2, the device is of a type specified opposite
        that class in column 2 of Schedule 2.

(3) If the Authority proposes to delete an approved emission  reduction device
from the register, he must give notice of the fact in the register at least 28
days beforehand, but may give a shorter period of notice, or no notice, if he
considers it necessary in the public interest.