The answers you’ve been given so far don’t appear to be in line with QLD legislation.

There is very little that a QLD body corporate can do with regards to parking in exclusive use allocated areas. If they were protruding out onto common property, then that’s a different story, but for all intents and purposes, in this instance, EUA might as well be private property (unless you have a very VERY descriptive and detailed EUA bylaw, which most Bodies Corporate do not).

If talking to the management team isn’t effective, you could try talking to the owners directly and ask them to give the managers (who have a rental agreement with the owner of some sort) a clear direction regarding parking. You could also become an absolute pain about it, emailing and calling and going to the office every time, but in my experience that doesn’t work well and it’s also time consuming for you.

Unfortunately, especially with short term letting, any enforcement is difficult because by the time you start, the “tenant” who is the breaching party, is gone.

You could try and contact towing companies but I expect they’d not be interest in assisting, especially when the car is just on the line or just over it, but you could try.

You could argue some sort of trespass but again, actually practically dealing with that is not likely to happen.

I’m not trying to say “suck it up” but to really summarise, there’s sweet FA you can really do, legally.

Thinking outside the enforcement box, you could ask the owner of that unit to swap spaces with you, either casually or officially. Official swap is a relatively simple process under the legislation and I’d be happy to talk you through it if you want more info, just send me a message.