Order of the National Green Tribunal in the matter of Mustak M Kadri Vs. State of Gujarat & Others dated 19/05/2017 regarding permission to buy 500 diesel buses by Gujarat State Transport Corporation. NGT permits the State Transport Corporation to buy the diesel buses provided they are BS-IV compliant.
Links:
[1] http://admin.indiaenvironmentportal.org.in/content/order-national-green-tribunal-regarding-permission-buy-500-diesel-buses-gujarat-state
[2] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/diesel-buses
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-standards
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/gujarat
[7] http://admin.indiaenvironmentportal.org.in/thesaurus/national-green-tribunal-ngt
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/court