New Delhi, April 10 -- The Delhi transport department has informed the National Green Tribunal (NGT) that it has challaned 60 government vehicles found plying without valid Pollution Under Control (PUC) certificates. The transport department also told the tribunal that it was taking internal measures to tighten compliance across its own fleet through a fresh directive - which directs all government bodies to ensure PUC is periodically assessed and renewed. In a submission dated April 7, the transport department said, "Action has been taken against erring vehicles, and challans have been issued to 60 vehicles without a valid PUC." The NGT was hearing a plea filed in 2024 by BJP MLA Jitendra Mahajan, alleging that authorities tasked with enfo...