Article 370 of the Indian constitution is an article that grants special autonomous status to the state of Jammu and Kashmir. The article is drafted in Part XXI of the Constitution: Temporary, Transitional and Special Provisions. The state's constituent assembly was empowered to recommend the articles of the Indian constitution to be applied to the state or to abrogate the Article 370 altogether. After the state constituent assembly has dissolved itself without recommending abrogation, the Article 370 was deemed to have become a permanent feature of the Indian constitution.
Jammu and Kashmirs original accession, like all other princely states, was on three matters: defence, foreign affairs and communications. All the princely states were invited to send representatives to India's Constituent Assembly, which was formulating a constitution for the whole of India. They were also encouraged to set up constituent assemblies for their own states. Most states were unable to set up assemblies in time, but a few states did, in particular Saurashtra Union, Travancore-Cochin and Mysore. In May 1949, the rulers and chief ministers of all the states agreed to accept the Constitution of India as their own constitution. The states that did elect constituent assemblies suggested a few amendments which were accepted. The position of all the states (or unions of states) thus became equivalent to that of regular Indian provinces. In particular, this meant that the subjects available for legislation by the Central and State governments was uniform across India.
In the case of Jammu and Kashmir, the representatives to the Constituent Assembly requested that only those provisions of the Indian Constitution that corresponded to the original Instrument of Accession should be applied to the State. Accordingly, the Article 370 was incorporated into the Indian Constitution, which stipulated that the other articles of the Constitution that gave powers to the Central Government would be applied to Jammu and Kashmir only with the concurrence of the State's constituent assembly. This was a "temporary provision" in that its applicability was intended to last till the formulation and adoption of the State's constitution. However, the State's constituent assembly dissolved itself on 25 January 1957 without recommending either abrogation or amendment of the Article 370. Thus the Article has become a permanent feature of the Indian constitution, as confirmed by various rulings of the Supreme Court of India and the High Court of Jammu and Kashmir, the latest of which was in October 2015.