Question: What are the restrictions on cruise ships?

Answer passage (source: Australia):
page_title: Industry and employers
section_headers: Cruise ship industry
section_content: As of 15 March 2020 there is a full restriction on arrivals of any cruise ship
that has left a foreign port. The restrictions are inclusive of direct
arrivals and Round Trip Cruises (RTC).
This measure will be reviewed after 30 days.
The health, welfare and safety of Australians, both at home and overseas, is
the highest priority of the Australian Government.
From 1am AEDST 16 March 2020, Australia will deny entry to any cruise ship
that has left a foreign port, with the exception of:

Australian-flagged vessels.
International cruise ships en route having departed their last overseas port and destined for Australia.
Australian cruise vessels (domestic cruise ships) operating within the Australian Exclusive Economic Zone can continue to operate without restriction.
Round Trip Cruises that are already in progress and currently returning to Australia.

Cruise ships that do not meet the above exemptions, may be approved through
the Maritime Traveller Processing Committee (MTPC). These approved cruise
ships will be required to go to Brisbane or Sydney.
Crew
Cruise ship crew must self-isolate for 14 days or for the duration of their
stay whichever is shorter.

Reviewer feedback on this answer:
Has a detailed overview of the current restrictions on cruise ships.
The answer acknowledges that there are restrictions.  The restrictions aren't listed and mentioned though.

Reviewer ratings:
Excellent
Acceptable

Answer passage (source: Australia):
page_title: Coronavirus (COVID-19)
section_headers: Travelling to Australia by yacht or small craft
section_content: If you’re planning to sail your yacht or small craft back to Australia,
carefully consider the risks to your personal health and safety and that of
your crew members from COVID-19 and related restrictions. Due to border
closures and other restrictions, you may not have access to ports and supplies
en route. It’s not the responsibility of the Australian government to
negotiate access or facilitate your journey.
At this time, we recommend you either moor your boat and stay where you are,
or if you wish to come home and flights are available, store your boat and fly
back to Australia.
See our Travelling by boat page for further information.

Reviewer feedback on this answer:
Focuses on yachts and other small craft, not cruise ships like asked.
This answer talks about personal vessels.  The question is about cruise ships.

Reviewer ratings:
Bad
Bad

Answer passage (source: Australia):
page_title: Coronavirus (COVID-19) advice for travellers
section_headers: Travel to Australia
Cruise ships
section_content: Since 27 March 2020 additional restrictions on cruise ships, including
domestic cruises, have been in place. All foreign cruise ships are legally
required to leave Australian waters and no foreign cruise ships may enter
Australian waters (except for some limited exceptions).
Before this, on 15 March, the Government announced a ban on the entry of
cruise ships that had left a foreign port. Cruise ships could apply for an
exemption to arrive at an Australian port if they were already underway and
returning home.
Australian Border Force and the Department of Foreign Affairs and Trade are
working to bring people back to Australia who were on a cruise when the ban
was announced. They will then work to get passengers to their home
destinations, either in Australia or overseas.
Cruise ship crews are not exempt from the mandatory quarantine requirements.

Reviewer feedback on this answer:
Clearly lists the restrictions the Australian government has put cruise ships.
The answer talks about restrictions on cruise ships.  It doesn't say what they are though.

Reviewer ratings:
Excellent
Acceptable