A blanket ban on pets is the textbook example of an oppressive by-law. What the law allows, what house rules are worth, and what a fenced courtyard changes.
Two kinds of by-law, four kinds of resolution, and the difference between "without dissent" and "unanimous" that decides whether your proposal passes.
Around 2 per cent of WA properties sell under the hammer. REIWA says why, and it comes down to the contract.