admissible to the assessee under section 80H and section 80HH) of so much of the amount thereof as does not exceed the amount calculated at the rate of six per cent per annum on the capital employed in the industrial undertaking or ship or business of the hotel as the case may be, computed in the prescribed manner in respect of the previous year relevant to the assessment year (the amount calculated as aforesaid being hereafter, in this section, referred to as the relevant amount of capital employed during the previous year) (2) The deduction specified in sub section (1) shall be allowed in computing the total income in respect of the assessment year relevant to the previous year in which the industrial undertaking begins to manufacture or produce articles or to operate its cold storage plant or plants or the ship is first brought into use or the business of the hotel starts functioning (such assessment year being hereafter, in this section, referred to as the initial assessment year) and each of the four assessment years immediately succeeding the initial assessment year.