The space force will enforce the USA needs on the Martians!

Also the us military assisted spaceX in its development. There’s a reason spaceX has ITAR compliance needs.

ITAR compliance is a requirement for anything which could be repurposed for certain classes of weapons. Working on an aircraft autopilot requires ITAR compliance.

Kind of a joke, but honestly there's not much someone on Earth could do to enforce their will on Mars. In practical terms they are on their own regardless.

Yes there is just like it’s done on earth at the point of a gun, all laws are enforced at the end of the day by gunpoint.

Except that it takes about 6 months for a gun from Earth to get to Mars. It's hard governing a place you can't easily reach.

And if a Mars colony really is self sustaining, stopping supply runs also doesn't do as much as you'd maybe like. Sending a gun(ship) might also be prohibitively expensive.

There's probably a lot of fiction written about exactly this topic. Maybe the Martians could buy their independence with Epstein drives.

It's likely enough that the Mars end of the service would enjoy being able to communicate with the ground stations on Earth.

The Outer Space Treaty is a treaty between governments. As a rule, treaties only apply to governments. So SpaceX can say whatever they like in a document, as it's legal to do so in the US and then act upon it based on US law. From my understanding this means that they can claim it all they like, but if they tried to enforce that claim against anyone it wouldn't work.