3Any application for a Factories Act certificate or an Offices Act certificate with respect to any premises which is pending at the time when by virtue of an order under section 1 of the 1971 Act a 1971 Act certificate becomes required in respect of those premises shall be deemed to be an application for a 1971 Act certificate in respect of them duly made in accordance with the 1971 Act and may be proceeded with accordingly; but (without prejudice to section 5(2) of the 1971 Act) the fire authority may, as a condition of proceeding with such an application, require the applicant to specify any matter or give them any information which would ordinarily have been required by section 5(1) of that Act.