Under section 231 of the ''[[Family Law Act]]'', when no other order will be sufficient to make someone comply with an order (or an agreement), the court can enforce the order (or the agreement) by imprisoning the breaching party for up to 30 days. You will need to prove to the court that no other order will be effective in making the breaching party comply with an agreement, and that's a very high bar to reach. And, because putting someone in jail is such a drastic step, don't expect the court to do this except in the most extreme circumstances.