You can thank the stupid, arrogant, megalomanic idiot Nehru for this sorry state of affiars. Indian citizens also need permits for other NE states, especially Arunachal Pardesh. This naieve, myopic, arrogant moron has brought India to brink of dissolution as united nation, and yet the brainless masses refuse to see the damage wrought by him and his Congress Party. Even Gandhi saw the danger to the nation posed by the continued existence of Congress Party, that's why he requested it be dismbanded after 'independence', to which the arrogant Nehru, told him to go jump. And now we have the Cong's boss Nehru's grand-daughter-in-law preaching to the world to follow Gandhi's edicts, even while her party has been doing quite the opposite. What big hypocrites they are!
