The that the State should not discriminate against
The Indian Constitution does not recognize State citizenship and as such there is no distinction between the citizens of two or more States.
Further, there is an exception to this rule when applied to Kashmir. No one other than a permanent resident of Kashmir can acquire landed property in Kashmir; but it is a purely temporary provision to be abolished when Kashmir is fully integrated to the Indian Union. The claim of Fundamental Rights is common to all citizens.
Article 15 of the Constitution provides that the State should not discriminate against any citizen on grounds of religion, race, caste, sex, place of birth or any of them. Single citizenship is a great step forward in the creation of a united and integrated India. According to M. V. Pylee, “the provision of single citizenship is a great step forward in the creation of an integrated Indian society.
As a result, the citizens of India are clothed with common civil and political rights all over the country………. A single citizenship for the entire country removes much of the artificial State barriers that prevailed in pre- independence days and facilitates the freedom of trade, commerce and intercourse throughout the territory of India”.