The NDA government has in recent months reiterated its plan to advance the timelines for rolling out BS-VI fuel norms across the country by skipping a stage (BS-V) entirely.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/pollution-government-rush-upgrade-emission-norms-but%E2%80%A6-where%E2%80%99s-engine-where%E2%80%99s-fuel
[2] http://admin.indiaenvironmentportal.org.in/category/author/anil-sasi
[3] http://admin.indiaenvironmentportal.org.in/category/author/sharmistha-mukherjee
[4] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-new-delhi
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicles
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicle-technology
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bharat-stage-iv
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/diesel