His trainer's admission, and the subsequent outcry, led to the drug being widely banned.
The BHA said there has only been one other case of anabolic steroids being found in a tested horse in recent years, which was when British trainer Howard Johnson allowed horses to run under the substances in 2008 and 2009.
The use of anabolic steroids is now prohibited at all times for any horse registered as "in training" under the care of a trainer licensed by the BHA.
However, it is still legal for out-of-competition use in Australia, such as helping to overcome injuries.
The BHA carries out testing during race meetings and while horses are in training.
In 2012, the organization tested 7,182 samples from a total of 90,174 runners -- 14 of which returned positive results. The BHA conducted between 600-700 tests in 2012 while horses were in training.