There are stringent punishment clauses against those who violate the order of the National Green Tribunal (NGT).
The NGT in an interim order had banned rat-hole mining in the state.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/violation-ngt-order-attracts-stringent-punishment
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/shillong-times-shillong
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/meghalaya
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mining
[5] http://admin.indiaenvironmentportal.org.in/thesaurus/national-green-tribunal-ngt
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/regulations
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mineral-based-indsutry