I'm a low hour PPL so my opinion isn't necessarily the most relevant, however I also have a good understanding of civil law.
My personal interpretation of the ANO quote above is that being part of the 'flight crew' means a qualified person who is required as part of the crew to operate the aircraft legally, i.e. if P2 is required, or a navigator etc. Being a passenger and manipulating the controls doesn't make you part of the flight crew.
My understanding is therefore that it is not in breach of any law to allow a passenger to do so, just that it remains the PIC's responsibility to ensure the aircraft remains safe at all times.
My father manipulated the controls of my plane over the weekend for a fairly lengthy amount of time. Only when we were at a sensible height and away from traffic, circuits etc. He doesn't hold any qualifications, although admittedly has significantly more hours than me even though their age would be measured in decades, not years!
Last edited by Ds3; 19th Dec 2012 at 13:01.