There are Mexican liveaboards?We're talking about US regulations here anyway. No reason a Mexican LOB would have to change unless Mexico also created a similar regulation. That said, one would hope that eventually passengers would come to demand safer charging systems and so boats from other countries might do something to improve safety.
The Nautilus is not MX, wasn't built in Mexico and isn't run by a Mexican company. She was built in China and has a Canadian captain. And probably has the absolute safest and most conscientious diving LOB boat and crew on the planet right now.
How something reasonable will trickle to SE Asia and the red sea is more debatable