Article I, Section 9 of the United States Constitution states that "The privilege of the writ of habeas corpus shall not be suspended, unless when in cases of rebellion or invasion the public safety may require it." Thats it. It doesn't place any limits on the geographic location, duration or anything else. Presumably the Supreme Court could rule that Congress has exceeded its Constitutional authority depending on the circumstances, such as following the passing of the public safety crisis that precipitated the writ's suspension or Congress could pass a law limiting its application, but the language of the section itself grants broad latitude.