About Income Tax

Respected Members, 

I wish to know about the exemption of Income Tax to the Schedule Tribes of North Eastern States like Assam, Tripura, Mizoram, Nagaland, Arunachal Pradesh.

Further, is this rule applicable to the resident of other states like Andhra Pradesh, Keral, Tamilnadu, Uttar Pradesh etc.

kindly comment on above two matters.