Thank you. That's a good question.
In fact, the Geneva conventions define who is a protected person in a situation of armed conflict or foreign occupation. The parties to the conflict are responsible for implementing their obligations in that respect. The U.S., of course, had been the occupying power in Iraq after its engagement in that country. In 2009 it handed over jurisdiction to the Iraqi government, which is why the Iraqi government is now responsible for the protection of the individuals in Camp Ashraf.