Tax exemption approval for a charitable institution under section 10 requires exclusive application of income and strict compliance. Notification grants tax-exempt status to Bharat Sevashram Sangha, Kolkata for specified assessment years subject to conditions: income must be applied or accumulated wholly and exclusively to the institution's objects; investments or deposits limited to modes permitted under the Act (with an exception for voluntary contributions maintained as jewellery or furniture); business profits are excluded unless incidental and maintained in separate books; regular filing of income-tax returns is required; and on dissolution surplus assets must transfer to a charitable organization with similar objectives.