No permission is required by non-resident Indian nationals to acquire immovable property in India.
Yes, Foreign nationals of Indian origin, whether resident in India or abroad, have been granted general permission to purchase immovable property in India.
The purchase consideration should be met either out of inward remittances in foreign exchange through normal banking channels or out of funds from NRE/FCNR accounts maintained with banks in India.
Non-resident Indians who are staying abroad may enter into an agreement through their relatives and/or by executing the Power of Attorney in their favour as it is not possible for them to be present for completing the formalities of purchase (negotiating with the builder or Developer, drafting and signing of agreements, taking possessions, etc) These formalities can be completed through some known person who can be given the Power of Attorney for this purpose. Power of Attorney should be executed on the stamp paper before the proper authorities in foreign countries. Power of Attorney cannot be drafted on the stamp paper bought in India.