Where any person is engaged in any primary market transaction or any secondary market transaction involving any corporate debt security issued by or on behalf of any company, on which income tex has been deducted under section 135 during any year of assessment at the rate of ten per centum at the time the interest is paid or credited or the discount is allowed on such security, such person shall be entitled to a notional tax credit at ten per centum of the grossed up amount of interest income from such transaction, to an amount of one ninth of the same, if such interest income forms part of the statutory income of such person being a company or the assessable income of such person being a person other than a company, for that year of assessment.”.