Title 6 › CHAPTER 1 — HOMELAND SECURITY ORGANIZATION › SUBCHAPTER VIII — COORDINATION WITH NON-FEDERAL ENTITIES; INSPECTOR GENERAL; UNITED STATES SECRET SERVICE; COAST GUARD; GENERAL PROVISIONS › Part H — Miscellaneous Provisions › § 466
Says the military must not be used to enforce laws except when the Constitution or an act of Congress allows it. The rule dates to 1878 and was meant to stop U.S. Marshals from calling the Army on their own. It has limited using the Armed Forces for domestic law enforcement, but it is not an absolute ban: Congress or the President can authorize military help in war, insurrection, or other serious emergencies. Notes that laws like chapter 13 of title 10 (the Insurrection Act) and the Robert T. Stafford Disaster Relief and Emergency Assistance Act (42 U.S.C. 5121 et seq.) give the President broad authority to use the Armed Forces to restore order, including after attacks with weapons of mass destruction. Congress reafirms that nothing here should be read to change how the Posse Comitatus rule applies.
Full Legal Text
Domestic Security, Source: USLM XML via OLRC
Legislative History
Reference
Citation
6 U.S.C. § 466
Title 6, Domestic Security
Last Updated
Sep 22, 2026
Release point: 119-110