Although the Flag Code is U.S. federal law, there is no penalty for a private citizen or group failing to comply with the Flag Code and it is not widely enforced-indeed, punitive enforcement would conflict with the First Amendment right to freedom of speech [REF].
The flag has been displayed on every U.S. spacecraft designed for manned flight, including Mercury, Gemini, Apollo Command/Service Module, Apollo Lunar Module, and the Space Shuttle.