The main criteria is if SpaceX can grantee margin of safety in regards to humans. Can they grantee that even in the worst case the rocket isn't gone fly into a town.
In this case this is specially hard because the core booster flies back towards the coast.
Do you have any information on the recovery plans for the booster and ship 24?
I have been curious about this and not seen much disclosure on the topic. Would ship 24 also be the largest re-entry vehicle, and largest re-entry vehicle to make ocean landing?
Edit: I was able to find some more information on the splashdown:
>During this time, the spacecraft will hurtle sideways, generating tremendous heat before adjusting to an upright position for a "soft " rocket-powered ocean landing 62 miles north of Kauai. It will sink in the Navy's Pacific Missile Range Facility, according to plans for the historic flight, and join dozens of warships that have gone down over past decades during Navy "sink exercises " in waters 15, 000 feet deep.