There is a very interesting principle embedded in Quirky’s post – the power of doing nothing.
If you honestly believe your building’s by-laws are invalid – and perhaps have taken legal advice to confirm that – then it might be worth the risk of maybe having to remove your pet at a later date.
As for costs, the NSW Tribunal has a very narrow range of circumstances under which they will award them, one of them being that the other side knew or should have know that the case had no merit.
But, as Quirky says, it’s not up to you to challenge the invalid laws, it’s up to the committee to prove that they are, in fact, valid when all the evidence is there to suggest otherwise.