While I agree on the point of vehicles made pre norms, but vehicle manufactured after their adoption are all mostly going to be compliant (although with the VW scam, I'm sure there are going to be significant doubts about whether the vehicles stay that way).

Can't argue on the emission check though, that I definitely believe. One can only hope newer vehicles don't have significant degradation in emissions over time.

I guess the main takeaway is that the Indian government has to enforce the rules more than anything.