A court may make a property adjustment order only if it is satisfied—
(a) the de facto partners have lived together in a de facto relationship for at least 2 years; or
(b) there is a child of the de facto partners who is under 18 years; or
(c) the de facto partner who applied for the order has made substantial contributions of the kind mentioned in section 291 or 292 and failure to make the order would result in serious injustice to the de facto partner.