Today I visited our prefecture to collect my renewed carte sejour, its valid for another 5 years, I asked about the 5 year rule for getting readmited to the C.P.A.M , and it was explained to me that after 5 years you are able to apply to become French citizen, you have to speak very good french and many other things, it was also exlplained that this can take some time! This is what is meant by the five year rule not just been able to prove you have lived here for five years, also it is only the Pefecture that can confirm your residency,it was pointed out to me that the date I arrived in France was printed on the back of my Carte Sejour and of course in all that time you have to have filled in a Tax form , this came as a bit of a shock! They told me that if I wanted to get the benefits of French people then I should apply to become a citizen , this is what is meant by the five year rule and that it is the only way to get back in the system