Vehicles Older Than 15 Years Won't Be Allowed In Delhi, Says Green Court

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"All vehicles, diesel or petrol, which are more than 15 years old, shall not be permitted to ply on the roads.  This direction would be applicable to all vehicles without exception i.e. two wheelers, three wheelers, four wheelers, light vehicles and heavy vehicles irrespective of whether commercial or otherwise," the bench said.

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ROTFL. Implement kar ke dikhaao tou maane.

The only way this will work - If the court / administration sets the implementation time-table / schedule / deadline to be 15-20 Years from now.