U.S. law holds that natural persons born on foreign ships docked at U.S. ports or born within the limit of U.S. territorial waters are U.S. citizens. An important exception to this rule is that children born to people who (in line with the 14th Amendment) are not "subject to the jurisdiction" of the United States (e.g., foreign diplomats accredited with the United States Department of State or invading foreign enemy forces) are not automatically U.S. citizens.[2] Despite a common misconception to the contrary, birth on board a U.S.-flagged ship, airliner, or military vessel outside of the 12-nautical-mile (22 km; 14 mi) limit is not considered to be a birth on U.S. territory, and the principle of jus soli thus does not apply.[3]