In 2012, then Environment Minister Jayanthi Natarajan overruled the views of the expert members of the NBWL standing committee and granted it wildlife clearance.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/minister-cannot-overrule-wildlife-board-rules-ngt
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/national-green-trbunal-ngt
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/legislation
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wildlife-clearance-0
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/arunachal
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hydroelectricity
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/forest-act-1980
[9] http://admin.indiaenvironmentportal.org.in/thesaurus/forest-clearance
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment