This discussion concerns a Conditional Deed of Settlement (CDOS) for a property in Chennai, co-owned by a father and son. The father initially executed a CDOS in favour of his son, retaining rights for himself and his wife during their lifetime. Now, the son wishes to execute a new CDOS to transfer his rights to his mother, with specific conditions regarding usage and sale. The core question is whether this subsequent CDOS is legally possible and valid, especially given the existing registered deed and the potential implications for ownership transfer.