National Geographic: Aussie Cats to be Kept Indoors, New Rules Propose
…The new law, currently being debated by the capital's Legislative Assembly, would require all house cats in the soon-to-be-built Canberra suburbs of Forde and Bonner to stay indoors or in fenced backyards.
Cat owners moving into the new suburbs would need to have their pets implanted with microchip identification tags. If the animals are found outside the fences, owners would face up to a thousand Australian dollars in fines.
That's the way to do it.