Where a person is registered as a registered user of a trade mark on an application made within one year from the commencement of this Act, subsection (2) of section twenty-eight of this Act shall have effect in relation to any previous use (whether before or after the commencement of this Act) of the trade mark by that person, being use in relation to the goods in respect of which he is registered and, where he is registered subject to conditions or restrictions, being use such as to comply substantially therewith, as if such previous use had been permitted use.