The original reporting is in the NYT gift link NYC posted on page 47 of this thread.
If story holds up that one of the survivors used a radio, the predetermination that the usage of a radio was a "combat act" will become significant. It will likely provide legal cover for the seal team 6 member(s) who pushed the button on the second strike. I don't think it's reasonable to ask a rank and file military member to on-the-spot adjudicate for themselves if using a radio is or is not a "combat action", once they've been told by superior it is, I would say they are immunized from executing a "clearly illegal" order.
That's not to say the order was legal, it was not (spoiler alert. using a radio to call for rescue is not a "combat action"), it is only to say that it wasn't a case where the person executing the order should have known it was an illegal order (once they had been assured by superiors that the target was engaged in a "combat action").
And of course all of that presupposed this was an armed conflict, which it was not. So with all that being said the people who planned and ordered all of these strikes are still liable for murder.
But what this new information tells us (if it all proves out to be as reported) is that the rank and file service members who carried out the second strike are not likely legally liable for executing an order they knew was illegal. Which, honestly is a good outcome (for the service members, not for the Venezuelan mariners), because those service members are in a very untenable position as it is. If, in the moment, they were being told it was a legal action under the rules of war by their superiors they shouldn't be held liable. At least in my opinion, I guess you could argue they should have had the sense to know what was what just from the facts on the ground, but in this highly specific scenario, I think giving the benefit of the doubt to the service members is the right call here.
Those who planned the attacks, ordered them, and made the determination that using a radio in this scenario was a "combat action"? Well, those guys are in a world of hurt.