Up to another 50 were to be deployed on Friday, as well as an additional 40 ADF personnel, which would bring the contingent up to 116 so far.
Major General Jake Ellwood described the situation as "volatile".
"We don't provide details about our rules of engagement, but what I can tell you is that our soldiers, sailors and aviators can protect and defend themselves," he said.
Soldiers and police from Australia are also afforded immunity: They "shall be immune from arrest, detention and all legal proceedings in Solomon Islands courts and tribunals in relation to actions that are taken in the course of, or are incidental to, official duties."
The treaty adds that they "shall not be compelled to appear or give evidence in legal proceedings of any kind in Solomon Islands courts and tribunals", however, Australia can waive that immunity.
Additionally, Australia — with the consent of Solomon Islands — may invite third states to contribute to the deployment.
"I have been in contact with the governments of Australia and Papua New Guinea, seeking their assistance to assist our country, which is forthcoming," he added.
The Prime Minister requested Australia's help under a security treaty the country signed with Australia in 2017.
The former high commissioner to Solomon Islands, James Batley, said given the Solomon Islands had initiated the request under the treaty, Australia was obliged to intervene.
Feels like a solid PR move on aus part if nothing else