The bit that must be used by nov 2011 doesnt matter, its wetline only , therefore anyone with a wetline can either service before nov 2011 which will cover for a year or chuck the auto bit away and keep the canister .
The canister lasts for years until either used or signs of corrosion .
You just weigh it on scales to check for 135 g min.
(Anyone who services themselves should have been able to recognise that and would know that the canisters fit almost all life jackets, auto and manual.135grams gros)