Section 66G(6) of the Conveyancing Act 1919 cannot be used to adjust co-owners' property interests on a broad just and equitable basis; it is limited to giving effect to rights arising from the co-ownership itself. Where parties to a de facto relationship seek to vary property adjustment orders under s 41(c) of the Property (Relationships) Act 1984, a causal chain must be established between the default, the circumstances arising from it, and the need for variation — the court cannot vary orders for any reason it considers just once a default is proved. Existing equitable rights (such as claims for improvements, occupation fees, and mortgage contribution) that are already protected in s 66G proceedings do not support a separate s 41(c) variation order.
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