Apart from the sale, the government has also prohibited use of all noise-emitting crackers from 10 pm to 6 am.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/no-high-decibel-firecrackers-allowed-madhya-pradesh-diwali
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/madhya-pradesh
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/noise-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/diwali
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/festival
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environmental-security
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment