Mass emission standards Bharat Stage IV (BS IV) will come into force across our country from
April 1, 2005
April 1, 2010.
April 1, 2017
April 1, 2020
Mass emission standards Bharat Stage IV (BS IV) will come into force across India from April 1, 2017 for 2-wheelers, 3-wheelers as well as 4-wheelers.