On Tue, Apr 21, 2020 at 1:10 PM Matt Corallo via NANOG <nanog@nanog.org> wrote:

That’s an interesting idea. I’m not sure that LACNIC would want to issue a ROA for RIPE IP space after RIPE issues an AS0 ROA, though. And you’d at least need some kind of time delay to give other RIRs and operators and chance to discuss the matter before allowing RIPE to issue the AS0 ROA, eg in my example mitigation strategy.

All 5 RIRs can issue ROAs for all the IP address spaces. They don't as a matter of coordinated operations, but that doesn't prevent court orders determining that to be done.

Rubens