According to a senior official in the Transport Department, as long as the NGT order is not modified, the fitness certificate of old diesel vehicles will not be renewed. So even though they won’t be challaned they will be plying illegally, and will be liable to be challaned, like any other vehicle irrespective of its age if they are plying without a valid fitness certificate.Naveen Gupta, general secretary of All India Motor Transport Congress (AIMTC) said over one lakh trucks older than ten years ply in the Capital. “We had hoped for a positive order from the NGT soon. But week after week, month after month, we have been disappointed. We requested the State as well as Central Government to do something to protect the interests of transporters, but they have failed,” he said.