In australia, it can be illegal too. Only 1 state has actually made it 100% illegal, that state being Queensland (which is a rather big state too, stupidly enough). Where I'm from (Victoria), it's not illegal at a state level, but some councils prohibit it in their local bylaws. In the rest of our states and territories the act of sleeping in your car isn't illegal, but some of the more affluent and snobby areas try to get around that by not offering anywhere to park overnight without permits or living in the area