Repossession of flat

Hi i own a flat of 600 sq ft in a cooperative housing society in ghatkopar west , it was let it out in 1968, the rent was fixed at rs 120 pm and ever since then it continues till date . the share certificates & maintenance bills are in our name . the society has issued a loi for redevelopment . the society has 81 memeber’s and 12 no’s are tenants . 7 out of 12 have negotiated transfer of ownership by receiving 1/3 cost of flat i.e rs 57.50 lacs (on basis of pugdee holding) question : 1.00 can we evict the tenant (he maintains it was under pugdee .(our contention is that in a cooperative housing society pugdee is invalid . he has no document to prove it ) q: is this contention correct . 2.00 the developer has offered 300 sq ft extra area . q: can we ask developer to compensate for exrea area and re -accomodate tenant in redeveloped flat of existing area ,of 600 sq ft in intervening period of redevelopment tenant can get rentals from developer . q 3 will the aaa be signed with us ? our strategy is after redevelopment we will ask for rent at market rate failing which can we ask him to vacate ?. please advise on above or any other advise which will help us retrieve the flat . does a notice have to be served on society ,tenant and redeveloper and what kind of notice please .