 However, if [New South Wales] chooses to exercise that power and enact a law for same-sex marriage, the law could be subject to challenge in the High Court of Australia" and that no current arguments "present an absolute impediment to achieving state-based or Commonwealth marriage equality".The ACT Government received legal advice supporting the lawfulness of its same-sex marriage law prior to the High Court ruling, though several legal experts expressed doubts.Aside from the Australian Capital Territory, Tasmania is the only other state or territory to have passed same-sex marriage legislation in a chamber of its legislature.