For decades defacto and same sex interest groups have lobbied parliament to have their relationships recognised under the provisions of the Family Law Act. Now de facto and same sex couples in most states have the same access to the law as married couples have had since 1975.
All the Eastern states (Qld, NSW, Vic and Tasmania) plus the two territories (ACT and NT) have referred their powers under state legislation to the commonwealth, which leaves South Australia and Western Australia choosing to regulate domestic relationships themselves. SA seams stuck in the past and WA has its own Family Court Act which mirrors much of the legislation in the Family Law Act.
Specifically, provisions that relate to Financial matters concerning defacto relationships can be found under PART VIIIAB of the Act.Financial agreements before de facto relationship – More Information. Financial agreements during de facto relationship – More Information. Financial agreements after breakdown of a de facto relationship –