dealership of TATA NANO

I would like to take the dealership of TATA NANO car and other TATA motors product in Darbhanga District, Bihar.
I have enough space invest on this.( For Service station ).
Could you please let me know the details and procedures for getting this dealership.
My contact Inforfmation:
Ram chandra Thakur
Email: ramchanda.thakur@yahoo.co.in
mob:09763703313,
tel:06272 262370