Actually NOTE 1, under 4.2.1 states:"Where the term 'documented procedure' is appears within the International Standard, this means that the procedure is established, documented, implemented and maintained."
I have always taken this to mean that we are required to follow our documented procedures, because the definition of "implement" according to the dictionary is "to put into practice". It makes no particular sense to have documents that you don't follow - that would be ludicrous! Everytime I have run into an instance where actual practice differs from procedure I cited it against 4.2.1.
Silly Girl