The live-fire exercises by the Chinese military came in response to the visit by US House Speaker Nancy Pelosi to Taiwan earlier this week.
Marles said China had flouted the United Nations Convention on the Law of the Sea by launching ballistic missiles.
“The UN Convention on the Law of the Sea is a completely understood treaty and an accepted part of the architecture of the global rules-based order,” said Marles,
“How it applies to the Taiwan Strait is also clear. And it does apply to the Taiwan Strait.”
His remarks counter China’s claim that the strait is not international waters.
Defence expert Malcolm Davis, of the Australian Strategic Policy Institute, told Weekend Today this morning it was important for the federal government to support Taiwan.
He said Taiwan was a liberal democracy, an important manufacturer of technology components, and occupied a strategically vital position in the Asia Pacific region.
“I think it’s important for us to strengthen relations with Taiwan .. and to also recognise that the Taiwanese people have the right to choose their own future,” Davis said.
China on Thursday launched threatening military exercises just off Taiwan’s coasts, running through to tomorrow.
Some missiles were sent flying over Taiwan itself, Chinese officials told state media – a significant increase in China’s menacing of the island.
Foreign Minister Penny Wong slammed China yesterday for launching ballistic missiles.
She said the military drills were “disproportionate and destabilising”.
The federal government has not backed or criticised Pelosi’s controversial visit to Taipei on Wednesday.