Archbishop Hilarion is the ROCA hierarch over the ROCA's diocesan jurisdiction of Australia. The Russian Orthodox Church Abroad (ROCA) entered into communion with the Patriarchate of Moscow on the Feast of the Ascension, 2007. They are thereby in communion with the community of Eastern Orthodox Churches, i.e. the Ancient Patriarchates of Constantinople, Alexandria, Antioch and Jerusalem, and the Churches of Greece, Serbia, Romania, Cyprus, etc. Accordingly, these autocephalos Orthodox Churches, must consider the ROCA to be "canonical;" functioning within the canons of the Orthodox Church.
I can't say that I know; however, I wasn't aware that the ROCA had a western rite. Archbishop Hilarion is a traditionalist. I had read that Saint John of Shanghai and San Francisco, for a time, while he was in Western Europe, had authorized a Western rite, but I did not know they had maintained a Western Rite. The Greek's, Antiochian's and Serbian's also have rather numerous parishes in Australia. The Serbian Bishop, Bishop Iriney, is an American, who grew up in the Greater Cleveland, Ohio area.