Order of the National Green Tribunal (Principal Bench, New Delhi) in the matter of Manoj Mishra Vs. Union of India & Ors dated 16/09/2015 regarding preventing and controlling pollution of River Yamuna as well as preventing degradation of its flood plain.
The Tribunal in its order said that "no commercial/construction activity by use of machines or otherwise, except floriculture and silviculture would be allowed to be carried on by any of the authorities, particularly DDA".
Links:
[1] http://admin.indiaenvironmentportal.org.in/content/order-national-green-tribunal-regarding-preventing-and-controlling-pollution-river-yamuna
[2] http://admin.indiaenvironmentportal.org.in/category/thesaurus/yamuna
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/river-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/court
[5] http://admin.indiaenvironmentportal.org.in/thesaurus/national-green-tribunal-ngt
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi-development-authority-dda
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hydrology
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/uttar-pradesh
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/religious-beliefs