Hi Sheila,
Did you get legal advice when you settled the first time? Did it go to Court?
It is possible that the settlement was not binding according to the Family Law Act 1975 (Comm.)?
Unless and until a binding Property Settlement is reached, or a Court approves or decides the matter, you are both still joined at the hip financially.
Time limits do apply. where approval of the Court is required before an application for a Property Settlement can be made.
Are you still married? or are you divorced?
If you are both divorced, and it was more than 12 months ago - if he wants to pressure for a Property Settlement, he will need to explain his delay, and obtain the consent of the Court, before he can take any further steps...
If you are still married or were divorced less than 12 months ago, and your last settlement (was not legally binding), he has a legal right to ask for a binding property settlement.
I await your responses.
Kind regards