Adivasi land on lease

It depends upon the terms and conditions of allotment of land of farmhouse, which are required to be perused.

Local laws apply to the land in question.

it is advisable to consult a local prudent lawyer for appreciation of facts and professional guidance.

You can file RTI Application to the Tehsildar of your jurisdictional area and can seek an authentic certified copy of laid down rules/orders/notifications.  You can seek such information by filing online RTI with a fee of Rs.10

Information solicited
1.Please inform the laid down procedure with such certified copy of orders/notifications/laid down norms/Rules and regulations for taking on a lease for 99 years of advasi Owens farmhouse on lease for 99 years lease by non advasi individual in Bhiiwandi, Thane at........................

Why 99 years lease? It is unusual that private persons lease land for such a long period?