I read Professor Grammond's arguments in March with interest. At first sight, I share his opinion. There is a very good chance that the federal Parliament can act alone. That said, everything revolves around what is considered an essential characteristic of the Supreme Court. Unfortunately, it is very hard to predict what the courts will decide. Having an opinion as a constitutional expert is one thing; it is quite another thing to predict which way the Supreme Court will lean. There seem to be very good arguments on both sides of the debate. That is why we have to proceed carefully in this matter.
On April 6th, 2017. See this statement in context.