I want to buy a new 150cc bike (Bajaj or Honda). With new emission norm BS VI to be implemented in year 2020, would current bike be allowed then? Kindly, share some information on this

@SVP I want to buy a new 150cc bike (Bajaj or Honda). With new emission norm BS VI to be implemented in year 2020, would current bike be allowed then? Kindly, share some information on this.