In a proceeding for assessment of the total income of the A Society to tax for the year 1956-57 it was claimed that under s. 14 13) of the Indian Income-tax Act, 1922 (as added by s. 10 of the finance Act, 1955, with effect from April l, 1955) the income of the Society from business was exempt from payment of tax, and that in accordance with the instructions issued under s. 60 of the Act, out of the gross income from securities amounting to Rs. 4,30,053/·, Rs. 4,16.475/· being income attributable to the B assets utilized in the business, only the balance of Rs. 13,578/· was chargeable to tax. In support of its claim the Society relied upon the instructions published in the Income-tax Manual, 1946. In the view of the Income-tax Officer the Society could not claim the benefit of the Departmental Instructions, since in the relevant year of assessment those instructions had ceased to operate, and C the Society's claim was governed by the Explanation to s. 8 of the Income-tax Act as incorporated by the Finance Act of 1956, with elfect from April I, 1956. He accordingly computed the taxable · income under the head-"interest on securities" in the sum of Rs. 59,498 /-. The Appellate Assistant Commissioner modified the order of the Income-tax Officer and reduced the taxable income under the head "interest on securities" to Rs. 13,578 /. applying D the Departmental Instructions. He held that the Explanation . to s. 8 of the Act applied to Banking Companies and not to Co-ope· ra.tive Societies.