The 2019 event in Apia, which features 26 sports, is just the second time Australia and New Zealand have been invited to attend.
Australia finished sixth on the medals table in Port Moresby four years ago, with 17 gold, 19 silver and 11 bronze, despite only being invited to compete alongside New Zealand in four sports: weightlifting, taekwondo, sailing and rugby sevens.
That number has been doubled in 2019 to include athletics, beach volleyball, judo and football, while archery will also hold a separate Olympic qualifier.
