No regulation at this time. Let's let the people who work and live there do that. Lets start with free and open market capitalism and see how quickly the moon will turn into a garden instead of the Lunar version of New York or Chicago or the San Francisco wasteland.
I know it would be difficult to schedule a new flight next month. I don't personally care how difficult it is or what it costs. Get those astronauts home. Kick that boeing thing to Pluto if necessary. If you ask Musk to get it done, he will.
"Boeing and NASA aren't worried" No, Boeing and NASA aren't up there. 50 years ago, NASA would simply not have tolerated this level of QC problem. Errors have been going on with this craft for years. Our Astronauts lives are at stake. Dump that thing in the ocean and send SpaceEx to get them...
We have both the technology and the intellctual where-with-all to accomplish it. Still, given current political trends, coupled with the fact that govenments ultimately control testing of appropriate efforts, it is naive.