The breather came following a meeting with various school associations, who requested for time so that students who used to travel in buses which have been impounded, do not suffer.
The official, however, said the Delhi government will not compromise on the safety and security of school students and after 10 days the transport department will resume the drive.
At least 345 school buses, including 20 of Ryan International Group of Institutions, were impounded last week by the Delhi government's transport department as part of its drive against errant school vehicles.
"The schools have been given time to ensure verification of their staff and fulfill other safety measures. The drive will remain postponed till September 28," a transport department official said.
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"The action was taken for two major violations concerning the drivers and conductors of the buses. While drivers did not possess public service vehicle badges, the conductors were found to be lacking in education qualification, which is class 10 pass, and not having proper licence," the official said.
"We requested for time to let schools complete the formalities and rectify loopholes, and a window till September 28 has been granted," he said.