«To promote amicable settlement of disputes between parties to a marriage attendant upon the dissolution of their marriage, the parties may enter into an agreement containing provisions for disposition of any property owned by either of them, maintenance of either of them, support, parental responsibility allocation of their children, and support of their children [for certain expenses such as education] after the children attain majority.» (krstevens.com)
Sections 90B - 90KA of the Family Law Act 1975 deal with financial agreements by parties to a marriage and sections 90UA - 90UN apply to financial agreements by de facto couples (if the de facto couple are ordinarily resident in a participating jurisdiction). (familycourt.gov.au)
«11 (1) A disposition is not a transfer of value if it is made by one party to a marriage in favour of the other party or... and is --(a) for the maintenance of the other party, or...» (newlawjournal.co.uk)