Any direct tax payable by the employer for any accounting year shall, subject to the following provisions, be calculated at the rates applicable to the income of the employer for that year, namely:—

(a) in calculating such tax no account shall be taken of—

(b) where the employer is a religious or a charitable institution to which the provisions of section 32 do not apply and the whole or any part of its income is exempt from tax under the Income-tax Act, then, with respect to the income so exempted, such institution shall be treated as if it were a company in which the public are substantially interested within the meaning of that Act;

(c) where the employer is individual or a Hindu Undivided Family, the tax payable by such employer under the Income-tax Act shall be calculated on the basis that the income derived by him from the establishment is his only income;

(d) where the income of any employer includes any profits and gains derived from the export of any goods or merchandise out of India and any rebate on such income is allowed under any law for the time being in force relating to direct taxes, then, no account shall be taken of such rebate;

(e) no account shall be taken of any rebate (other than development rebate or investment allowance or development allowance) or credit or relief or deduction (not hereinbefore mentioned in this section) in the payment of any direct tax allowed under any law for the time being in force relating to direct taxes or under the relevant annual Finance Act, for the development of any industry.