Which of the following statements are correct?
1. Article 371A, which applies to Nagaland, provides special provisions for protecting land, resources, and customary laws.
2. Rat-hole coal mining is currently legal across all states of India under special provisions under Article 371.
3. The Sixth Schedule of the Indian Constitution provides autonomy to tribal councils, but state laws can override council laws under certain conditions.
4. The National Green Tribunal banned rat-hole coal mining in Meghalaya in 2014, and the ban was later extended to other parts of Northeast India.
Which of the above statements are correct?