I sometimes a ride to my wife (as a pillion) around the block and always give her my current helmet. I myself use the one I crashed in. It still has the Australian Standards sticker, but no visor and is visibly damaged. I know it is not a good idea, but since I'm not riding with her often (maybe only once a month), far (just around the suburn) or fast (below 30-50kmh) I don't want to buy a second helmet yet. So is it legal to wear it?