Analysis of information sources in references of the Wikipedia article "History of Formula One regulations" in English language version.
Point 6 says that the driver's cockpit shall be open at the top and that the wheels of the car shall remain uncovered. On this point I differ with the F.I.A. very strongly. for aerodynamics applied to the racing car are an obvious line of development and have been the subject of numerous interesting, though not convincing, experiments by most of the leading Grand Prix designers. The new rule is plain enough, but I disagree with it, and no doubt will many other people. On the other hand, those people intent on making racing safe have good reason in demanding open cockpits, for I doubt whether Moss could have got out of the experimental Vanwall in a hurry during the Monza practice this year, and you never know when you might want to leave in a hurry. As far as enclosure of the wheels is concerned, the banning of this will ensure that the cars continue to look like racing cars as we know them traditionally, and there are many people who like a racing car to look like one, even if it is an unscientific design.