The ban on use of generator sets, with exceptions for essential services, has been in force in Delhi since 17 October when the Supreme Court-empowered Environment Pollution (Prevention and Control)
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/ban-gensets-capital-evokes-mixed-views
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/statesman-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/diesel
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment-pollution-control-authority-epca
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi-pollution-control-committee-dpcc
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/construction-industry
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/industrial-pollution