79. In relation to a person who was at a time before 1st January 1997 the holder of a licence authorising the driving of vehicles of a class included in category B (except a licence authorising only the driving of vehicles included in sub-category B1 or B1 (invalid carriages)), regulation 7(5) shall apply as if paragraphs (b) and (c) and the words “on behalf of a non-commercial body" were omitted.