Property (Relationships) Act 1976, ss 9A, 17, 17A
Where the value of one spouse’s or partner’s separate property is increased by:
the direct or indirect actions of the other spouse or partner, or
the use of relationship property,
then the increase in the value of the separate property is considered to be relationship property and is divided according to the contributions of each spouse or partner to the increase.
Where the separate property of one spouse or partner has been sustained by:
the direct or indirect actions of the other spouse or partner, or
the use of relationship property,
the court may increase the share of the other spouse or partner in the relationship property or order that they be paid compensation.
Where the separate property of one spouse or partner has been reduced in value by the deliberate action or inaction of the other spouse or partner, the court may reduce the share of the other spouse or partner in the relationship property.