A member of the Armed Forces on active duty may:
4.1.1.6. Write a letter to the editor of a newspaper expressing the member’s personal views on public issues or political candidates, if such action is not part of an organized letter-writing campaign or a solicitation of votes for or against a political party or partisan political cause or candidate. If the letter identifies the member as on active duty (or if the member is otherwise reasonably identifiable as a member of the Armed Forces), the letter should clearly state that the views expressed are those of the individual only and not those of the Department of Defense (or Department of Homeland Security for members of the Coast Guard).
4.1.1.8. Display a political bumper sticker on the member’s private vehicle.
A member of the Armed Forces on active duty shall not:
4.1.2.5. Speak before a partisan political gathering, including any gathering that promotes a partisan political party, candidate, or cause.
4.1.2.11. Display a large political sign, banner, or poster (as distinguished from a bumper sticker) on a private vehicle.
4.1.2.12. Display a partisan political sign, poster, banner, or similar device visible to the public at one’s residence on a military installation, even if that residence is part of a privatized housing development.