Amendment of section 140B.41. In section 140B of the Income-tax Act, in sub-section (3), after clause (ii), the following clauses shall be inserted, namely:-"(iii) sixty per cent of aggregate of tax and interest payable, as determined in sub-section (1) or sub-section (2), as the case may be, if such return is furnished after the expiry of twenty-four months from the end of the relevant assessment year but before completion of the period of thirty-six months from the end of the relevant assessment year; or(iv) seventy per cent. of aggregate of tax and interest payable, as determined in sub-section (1) or sub-section (2), as the case may be, if such return is furnished after the expiry of thirty-six months from the end of the relevant assessment year but before completion of the period of forty-eight months from the end of the relevant assessment year.".