Tax exemption recognition for charitable society, subject to exclusive application of income, specified investments, recordkeeping and dissolution asset transfer. The Central Government notifies the Delhi Society for Mentally Retarded Children under section 10(23C)(iv) for specified assessment years, subject to conditions: apply or accumulate income exclusively for charitable objects; restrict investments to forms permitted under section 11(5) (excluding certain voluntary contributions held as jewellery or furniture); treat business income as excluded unless incidental and maintained in separate books; regularly file income-tax returns; and transfer surplus and assets on dissolution to a charitable organization with similar objectives.