In a 2004 decision (Re Alex) the Family Court of Australia found that the court's permission was required for puberty blockers. It took until 2013 for that decision to be reversed in Re Jamie.

The Court in Re Jamie held that Stage 1 treatment could be described as therapeutic. Because Stage 1 was reversible, none of the concerns of the High Court of Australia about risk of the wrong decision, or grave consequences, arose.

There's a long discussion of the journey back from Re Alex in this extraordinary presentation from Justice Steven Strickland, Judge of the Appeal Division and Chair, Law Reform Committee, Family Court of Australia. http://www.familycourt.gov.au/wps/wcm/connect/fcoaweb/reports-and-publications/speeches-conference-papers/2014/

I am very grateful to @katedoak for the link.

The decision yesterday was a shameful moment for our legal system and I will not rest until it is overturned.