Arm,
unless you did the walkaround 8hrs before you flew it and had the coldie then (despite the fact that you'd probably be zero by then anyway), CAR 256 (3) would still apply:
in short "no grog 8 hours before departure" would still apply.
mcgrath, i think when the AOD info packs came out, it had something stating that a reading below 0.02 is taken to be sober for some reason, maybe due accuracy or the potential of false zeros.
however i cannot find anything yet that had the explanation on it.