A bench headed by NGT Chairperson Justice Swatanter Kumar also directed the DDA Vice Chairman to hold a meeting "once in six months" with officials of various municipal corporations and other concerned bodies on the matter.
"We direct the Vice Chairman, DDA to take up one meeting at least once in six months...And progress report in relation to deconcretisation and protection of trees falling under the jurisdiction of different corporations, Public Works Department, New Delhi Municipal Council and Delhi Cantonment Board be prepared.
NGT had earlier issued show-cause notice to the South Delhi Municipal Corporation's (SDMC) Commissioner asking why contempt proceedings should not be initiated against him for violating its order on felling of trees.
It had issued notice to SDMC Commissioner Puneet Kumar Goel citing violation of its April 2013 orders to public authorities not to carry out construction and repair within one metre radius of trees.
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In April 2013, NGT had issued orders prohibiting excavation work within one meter radius of trees and ensure removal of any concrete structure surrounding trees within one meter.
It had directed public authorities like Municipal Corporations of Delhi, Delhi Development Authority, Delhi Transport Corporation, National Highways Authority of India that signboards, advertisements, boards and nails be removed from the trees.