Space treaties (like sea treaties) consider states to be the parties to the treaty, and states are responsible for ensuring compliance from their private compan

Space treaties (like sea treaties) consider states to be the parties to the treaty, and states are responsible for ensuring compliance from their private companies. Private companies are not directly party to the treaty. So, for example, if a treaty requires the United States to do something (such as avoid using a certain type of resource), the United States is responsible for making US companies (like SpaceX or ULA or whoever) comply. Again, this comes from the sea law tradition: private ships at sea must be registered in some state, which is responsible for ensuring compliance with the international laws to which that state is party.