The decision will mean that about two dozen week-old marriages have no legal effect.
I reckon there are now 20 devastated couples who had gotten married on the basis of the ACT law. Whatever the merits of gay marriage are the hippy progressives in the ACT parliament have used those people as political footballs. That is disgraceful.
Politicians in the States and Territories (not to mention the Feds) should know section 109:
109. When a law of a State is inconsistent with a law of the Commonwealth, the latter shall prevail, and the former shall, to the extent of the inconsistency, be invalid.
Then there is section 51 (xxi) – the federal parliament has the power to makes laws regarding marriage.