Mate I dont mean to state the obvious, but the "can system" works in most countries, so I am sure it will even work in little new zuland!!! It works in aust, and here in asia very well, and yes if A pax doesn't turn up, he/she as well as the bags are offloaded, and it only takes a few minutes.Its much faster to find a bag with the can system as oposed to the old 737 throw em in system. Everything is barcoded, so the ground crew know exactly which can the bags are in. No big deal !!!! The ground crews, once used to the system will turn an aircraft around that has cans alot faster than the one that does not.