Girl With The American Flag

Although the Flag Code is U.S. federal law, it is only binding on government institutions displaying the flag: 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. Passage of the proposed Flag Desecration Amendment would overrule legal precedent that has been established.
• Display on vehicles
When the flag is affixed to the side of a vehicle (land, sea or air), it should be oriented so that the union is towards the front, as if the flag were streaming backwards from its hoist as the vehicle moves forward. Therefore, U.S. flag decals on the right sides of vehicles may appear to be "reversed", with the union to the observer's right instead of left as more commonly seen.
The flag has been displayed on every US spacecraft designed for manned flight, including Mercury, Gemini, Apollo Command/Service Module, Apollo Lunar Module, and the Space Shuttle. The flag also appeared on the S-IC first stage of the Saturn V launch vehicle used for Apollo. But since Mercury, Gemini and Apollo were launched and landed vertically and were not capable of horizontal atmospheric flight like an airplane, the "streaming" convention was not followed and these flags were oriented with the stripes running horizontally, perpendicular to the direction of flight.