From what I have read and understand, the limit is 53'. If the load is longer than 53' and cannot be broken down any shorter than that, then you can get a permit. But to get a permit for a trailer that is overlength for no other reason is something they don't plan to hand out permits for. It does make sense if you think about it. Why make a limit of 53' and then hand out permits to anyone who simply has a longer trailer than what is allowed? If people think that 56' should be the limit, then the only alternative is to lobby the government to change the rules.