Senator REYNOLDS (Western Australia—Minister for Defence) (15:03): Maintaining vital trade and energy flows through key choke points like the Strait of Hormuz is crucial to the global trading system, the international economy and also Australia's prosperity. Around 40 per cent of the fuel used in Australia transits through the Strait of Hormuz and is either refined here or overseas. The International Maritime Security Construct seeks to provide freedom of navigation through these shipping lanes, which reach directly into the Indo-Pacific region and well beyond. Under the IMSC, HMAS Toowoomba will work with international partners to monitor and deter destabilising activities which could disrupt trade and also vital energy flows. She will also support the safe passage of commercial and civilian shipping in the region.