In Australia, the term "de facto relationship" is often used to refer to relationships between any two persons who are not married, but are effectively living in certain domestic circumstances. Since March 1, 2009, de facto relationships have been recognized in the Family Law Act (Commonwealth), applicable in states that have referred their jurisdiction on de facto couples to the Commonwealth's jurisdiction. In Western Australia, the only state that has not referred its jurisdiction, state legislation is still valid. There is also no federal recognition of de facto relationships existing outside of Australia (see Section 51(xxxvii) of the Australian Constitution), and so this is also a state matter.