Question: How to travel into Australia during the COVID-19  outbreak

Answer passage (source: Australia):
page_title: Coronavirus (COVID-19) advice for travellers
section_headers: Travel within Australia
section_content: Australians must avoid all non-essential domestic travel.
State and territory restrictions
States and territories can apply their own restrictions, including closing
their state borders and additional quarantine requirements. Find out more
about restrictions in your state or territory:

Australian Capital Territory:ACT Government travel advice
New South Wales: NSW Government travel and transport advice
Northern Territory:Northern Territory Government remote work and travel
Queensland: Queensland Government travel advice
South Australia:Government of South Australia cross-border travel
Tasmania:Tasmanian Government travellers and visitors
Victoria : Victoria State Government Health and Human Services
Western Australia:Government of Western Australia travel advice
Norfolk Island: Norfolk Island Regional Council COVID-19 advice
Indian Ocean Territories: Advice from the Administrator of Christmas Island and the Cocos (Keeling) Islands

Remote area restrictions
The Australian Government is restricting travel to certain remote communities
(designated areas). These restrictions aim to protect Community Elders and
those already sick.
Before you can enter a designated area, you must quarantine for 14
days.
If you are already in a designated area, stay there unless it is essential to
leave for medical treatment.
Find out how to access remote designated
areas.
To view the maps of designated areas and to find out more, see:

Maps of designated biosecurity (travel restricted) areas
Stay in your community and if you can, stay home
Biosecurity (Human Biosecurity Emergency) (Human Coronavirus with Pandemic Potential) (Emergency Requirements for Remote Communities) Determination 2020


Reviewer feedback on this answer:
This answer relates to domestic travel and does not relate to traveling into Australia.
This response is focused on the travel restrictions in different areas of Australia. It mentions the self isolating law but there isn't really anything about how to travel there which is what the question wants to know

Reviewer ratings:
Bad
Could be Improved

Answer passage (source: Australia):
page_title: Coronavirus (COVID-19)
section_headers: Getting home
No flights out?
section_content: If you wish to return to Australia, and there are still commercial flights
available, take them as soon as possible. While we know it can be frustrating
or expensive, the window of opportunity is closing.
Many travellers are having difficulty getting home because of flight cancellations or movement restrictions.
If you’re one of them, we know it’s a stressful and difficult time.
Where commercial flights are not available, we’re working with the airline
industry and other governments to help Australians find ways to get home. This
includes a special partnership with Qantas and Virgin Australia and
facilitated flights from several destinations.
See further details on the COVID-19 – Helping Australians to return
home page.
Over the past few weeks, we’ve also worked with cruise operators and other
governments to bring home thousands of Australian passengers from cruise
ships.
Check the website of your nearest Australian embassy or high
commission and follow them closely on social
media for updates
about flights back to Australia. Some embassies and high commissions are
providing the option for Australians to register for direct communication,
including in some places to receive updates on potential unscheduled
commercial flights.

Reviewer feedback on this answer:
This answer only discusses to get back to Australia as soon as possible, not how to travel into Australia.
This is a good response. It talks about the availability of commercial flights and how they're also working with cruise lines to get people to Australia by sea. This answers the question directly

Reviewer ratings:
Could be Improved
Excellent

Answer passage (source: Australia):
page_title: Coronavirus (COVID-19) advice for travellers
section_headers: Travel to Australia
Quarantine for arriving travellers 
section_content: Since 29 March 2020, all travellers arriving in Australia by air or sea must
be isolated in mandatory quarantine accommodation for 14
days from their arrival, with
few exceptions. After mandatory quarantine, they can transit domestically and
travel home.
These requirements are managed and enforced by state and territory governments
with Australian Government support, including from the Australian Defence
Force and Australian Border Force.
Travellers are quarantined in the city they arrive in for 14 days, even if
they don’t normally live there or plan to travel elsewhere in Australia from
there.
Most quarantine accommodation is being managed by state and territory
governments. They will:

handle transport for travellers from their arrival point to their quarantine accommodation
manage quarantine arrangements at the accommodation facility

To find out more about the quarantine requirements in your state or territory,
or to ask about someone you know who has been quarantined, contact your state
or territory government health department.
The Chief Medical Officer can, in consultation with the Australian Health
Protection Principal Committee, declare a
Human Health Response Zone (HHRZ) to support quarantine and isolation
procedures. Mandatory quarantine arrangements are mostly being managed under
state and territory public health legislation.

Reviewer feedback on this answer:
This answer is thorough and concise of how to travel into Australia during the pandemic.
This response is mostly focused on self isolation when arriving in Australia but the question wants to know how to actually travel there. This answer only touches on traveling by air or see but not how to do it

Reviewer ratings:
Excellent
Could be Improved