How Article 371 (A), (B), (C) & (G) make Nagaland, Assam, Manipur and Mizoram so special?

NE NOW NEWS
GUWAHATI, Aug 23 : While abrogation of Article 370 has taken India by storm, very few people know that six States in the North East enjoy special provisions under Article 371.
The North East India States of Nagaland, Assam, Manipur, Sikkim, Mizoram and Arunachal Pradesh enjoy special provisions.
Nagaland:
Article 371A makes special provision with respect to the State of Nagaland to protect the rights of the tribal population.
Notwithstanding anything in this Constitution, no Act of Parliament in respect of-
(a) religious or social practices of the Nagas,
(b) Naga customary law and procedure, administration of civil and criminal justice involving decisions according to Naga customary law,
(c) ownership and transfer of land and its resources,
The special provisions under Article 371 A shall apply in Nagaland unless the Legislative Assembly by a resolution so decides.
Assam:
Article 371B makes special provision with respect to the States of Assam.
Notwithstanding anything in this Constitution, the President may, by order made with respect to the State of Assam, provide for the constitution and functions of a committee of the Legislative Assembly of the State consisting of members of that Assembly elected from the tribal areas specified in Part I of the table appended to paragraph 20 of the Sixth Schedule and such number of other members of that Assembly as may be specified in the order and for the modifications to be made in the rules of procedure of that Assembly for the constitution and proper functioning of such committee.
Manipur:
Article 371C of Constitution of India makes special provision with respect to the State of Manipur.
(1) Notwithstanding anything in this Constitution, the President may, by order made with respect to the State of Manipur, provide for the constitution and functions of a committee of the Legislative Assembly of the State consisting of members of that Assembly elected from the Hill Areas of that State, for the modifications to be made in the rules of business of the Government and in the rules of procedure of the Legislative Assembly of the State and for any special responsibility of the Governor in order to secure the proper functioning of such committee.
(2) The Governor shall annually, or whenever so required by the President, make a report to the President regarding the administration of the Hill Areas in the State of Manipur and the executive power of the Union shall extend to the giving of directions to the State as to the administration of the said areas.
Mizoram:
Article 371G of Constitution of India makes pecial provision with respect to the state of Mizoram.
Notwithstanding anything in this Constitution,-
(a) No Act of President in respect of –
(i) religious or social practices of the Mizos,
(ii) Mizo customary law and procedure,
(iii) administration of civil and criminal justice involving decisions according to Mizo customary law,
(iv) ownership and transfer of land, shall apply to the State of Mizoram unless the Legislative Assembly of the State of Mizoram by a resolution so decides:
Provided that nothing in this clause shall apply to any Central Act in force in the union territory of Mizoram immediately before the commencement of the Constitution (Fifty-third Amendment) Act, 1986;
(b) The Legislative Assembly of the State of Mizoram shall consist of not less than forty members.

        To be continued