The point is, if our legal system considered that people keeping to the 'spirit' of the law were sufficient, then the speed limit would be sufficient, and there would be no need for other laws on dangerous driving, driving without due care etc...
The fact is, the law recognises the potential harm caused by dangerous driving so, it deals with it. Cruising about within a fairly small area harms nobody, so there's no other legislation to deal with it. So the spirit of the law, or of the licence is a myth. It's just people wanting everybody to agree with them.
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In 1995?