US MARINES PERMISSIBLE AND PROHIBITED CONDUCT RELATED TO PUBLIC DEMONSTRATIONS released Jan 21, 2021
(not the whole thing; sauce at bottom)
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Permissible Activities:
4.a. Military personnel may exercise their First Amendment rights, provided they do not violate law or regulation as detailed in paragraph 5 below.
4.b. Military personnel may attend a peaceful protest while in their private capacity, while not in uniform, not on duty, and not making a speech at said protest.
4.c. Military personnel may utilize social media as long as they do not comment, post, or link to material that violates the UCMJ or Marine Corps/Navy regulations. Refer to the Marine Corps Social Media Handbook 2021 for more detailed guidance at www.marines.mil/News/Social-Media/ (scroll to bottom of page).
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Prohibited Activities:
5.a. Military personnel may not actively advocate supremacist, extremist, or criminal doctrine, ideology, or causes that advance, encourage, or advocate illegal discrimination, based on race, color, sex, religion, ethnicity, gender identity, sexual orientation, or national origin or those that advance, encourage, or advocate the use of force, violence, or criminal activity.
5.b. Military personnel shall reject active participation in organizations that advocate doctrine, ideology, or causes that attempt to create illegal discrimination, based on race, color, sex, religion, ethnicity, gender identity, sexual orientation, or national origin, or advocate the use of force, violence, or criminal activity. Active participation includes (but is not limited to): fundraising; demonstrating or rallying; recruiting, training, organizing or leading members; distributing material (in print or on-line); and any other activity that furthers the objectives of these organizations.
5.c. Military personnel are prohibited from participating in off-base demonstrations if: 1) they are on-duty; 2) they are in a foreign country; 3) the activities constitute a breach of law and order; 4) violence is likely to result; 5) they are in uniform; or 6) the location has been placed off-limits by a commander.
5.d. Per reference a, military officers, to include chief warrant officers, may not use contemptuous words against the President, the Vice President, Congress, the Secretary of Defense, the Secretary of a military department, the Secretary of Homeland Security, or the Governor or legislature of any State, Territory, Commonwealth, or possession in which the service member is on duty or present.
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The conduct listed in paragraph 4 above may be investigated and, if appropriate, prosecuted under the Uniform Code of Military Justice (UCMJ), or Title 18, United States Code.
https://www.marines.mil/News/Messages/Messages-Display/Article/2469825/permissible-and-prohibited-conduct-related-to-public-demonstrations/utm_source/facebook/utm_medium/social/utm_campaign/man/