There are a couple of considerations.
One, Australia is currently conducting a study. They started in 2018. It is a four-year study looking at how assistance dogs—the term they use is “psychiatric assistance dogs”—can complement other evidence-based treatment. They were also looking at practical implementation challenges for a formal program. That study is still ongoing.
Partway through that study, they announced that they would cover psychiatric assistance dogs through their rehabilitation appliances program under certain conditions. One of the main conditions is that the veteran has to be currently undergoing treatment with a psychiatrist or a psychologist for at least three months, and they have to meet some other criteria. Thus, it's not something that a veteran with PTSD can immediately access. They have to be part of certain programs and have certain coverage levels.