Admission in IIT For US born students (living in India)


Dear all,

My son was born in US and we are living in India for the past 12+ years. While the whole process of admission in NIT/IIIT under DASA quota for foreign students is quite clear, There is a whole lot of confusion in the mind related to admission in IIT.

Can someone point me to right direction or provide clarifications on this topic?
Will this be SAT score based or JEE exam based admission for such students?

Many Thanks