Friends - please read my posts above, the RBI makes it VERY clear - it is really simple and straight forward. NRIs, PIOs and OCIs are treated similarly...
Please read this RBI FAQ (and others) and all your questions will be answered - it is really very comprehensive.
http://www.rbi.org.in/scripts/FAQAcquisition.aspx
Q.9. Can a person resident outside India (i.e. a NRI or a PIO or a foreign national of non-Indian origin) acquire agricultural land/plantation property/farm house in India by way of purchase?
A.9. No. A person resident outside India cannot acquire by way of purchase agricultural land/plantation property/farm house in India.
Q. 12. Can a person resident outside India (i.e. a NRI or a PIO or a foreign national of non-Indian origin) acquire agricultural land/plantation property/farm house in India by way of gift?
A. 12. No. A person resident outside India cannot acquire agricultural land/plantation property/farm house in India by way of gift.
Q.46. Can NRI who had acquired immovable property viz., residential/commercial property/agricultural land/plantation property/farm house in India while he was a person resident in India continue to hold or transfer such immovable property? In which account the sale proceeds may be credited?
A.46. Yes, under the provisions of Section 6 (5) of the Foreign Exchange Management Act, 1999 NRI who had acquired immovable property in India while he was a person resident in India may continue to hold such property. Under the general permission available he may transfer by way of sale or gift agricultural land/plantation property/farm house in India to a person resident in India who is a citizen of India and may transfer by way of sale or gift residential/commercial property in India to a person resident in India or to a NRI/PIO. The sale proceeds may be credited to NRO account.
Q.47. Can a PIO who had acquired immovable property viz., residential/commercial property/agricultural land/plantation property/farm house in India while he was a person resident in India continue to hold or transfer such immovable property? In which account the sale proceeds may be credited?
A.47. Yes, under the provisions of Section 6 (5) of the Foreign Exchange Management Act, 1999, PIO who had acquired immovable property in India while he was a person resident in India may continue to hold such property. Under the general permission available he may transfer agricultural land/plantation property/farm house in India by way of sale or gift to a person resident in India who is a citizen of India and residential/commercial property in India by way of sale to a person resident in India and way of gift residential/commercial property in India to to a person resident in India or to a NRI/PIO. However, if a PIO is a citizen of Pakistan or Bangladesh or Sri Lanka or Afghanistan or China or Iran or Nepal or Bhutan he should seek prior approval of Reserve Bank for transfer of such immovable property in India. The sale proceeds may be credited to NRO account.
Q. 22. Under general permission available to whom can NRI/PIO transfer by way of gift agricultural land/plantation property/farm house in India?
A.22. Under the general permission available NRI/PIO may transfer by way of gift agricultural land/plantation property/farm house in India to a person resident in India who is a citizen of India.
Q.23. Can a foreign national of non-Indian origin resident outside India transfer by way of gift agricultural land/plantation property/farm house acquired by him in India?
A.23. No. A foreign national of non-Indian origin resident outside India would need to seek prior approval of Reserve Bank for transfer by way of gift agricultural land/plantation property/farm house acquired by him in India.
Q.19. Under general permission available to whom can NRI/PIO transfer by way of sale his agricultural land/plantation property/farm house in India?
A.19. Under the general permission available NRI/PIO may transfer by way of sale his agricultural land/plantation property/farm house in India to a person resident in India who is a citizen of India.
Q.20. Can a foreign national of non-Indian origin resident outside India transfer by way of sale agricultural land/plantation property/farm house acquired by him in India?
A. 20. A foreign national of non-Indian origin resident outside India would need to seek prior approval of Reserve Bank for transfer, by way of sale, agricultural land/plantation property/farm house acquired in India.
Q.13. Can a person resident outside India (i.e. NRI or PIO or foreign national of non-Indian origin) hold any immovable property in India acquired by way of inheritance from a person resident in India?
A.13. Yes. A person resident outside India can hold immovable property acquired by way of inheritance from a person resident in India as per the provisions of Section 6(5) of the Foreign Exchange Management Act, 1999.
Q.14. Can a person resident outside India (i.e. NRI or PIO or foreign national of non-Indian origin) hold any immovable property in India acquired by way of inheritance from a person resident outside India?
A. 14. With the specific approval of Reserve Bank ... etc