2018 Amendments to the Manual for Courts-Martial, United States
Mar 8, 2018
Signed by: Donald Trump
Signed on: Mar 1, 2018
Published on: Mar 8, 2018
Mar 8, 2018
Signed by: Donald Trump
Signed on: Mar 1, 2018
Published on: Mar 8, 2018
Summary
Changes the rules for military trials and punishments to follow the Military Justice Act of 2016.
What problem does this solve?
The rules for military justice were outdated and did not match the new Military Justice Act of 2016 passed by Congress. This order updates the Manual for Courts-Martial to include the new rules and sets the dates for when they will start.
What does this order do?
Updates the Manual for Courts-Martial
Amends Parts II, III, and IV of the Manual for Courts-Martial, which contains the rules for military trials.
Sets effective date for new justice rules
Establishes January 1, 2019, as the main start date for the changes made by the Military Justice Act of 2016.
Prevents retroactive punishment
Ensures that no one can be punished for an act that was not a crime at the time it was committed. It also prevents punishments from being increased for past offenses.
Keeps old rules for ongoing cases
States that legal actions, investigations, and trials that began before January 1, 2019, will continue under the old rules.
Requires new guidance for commanders
Directs the Secretary of Defense to create guidance for commanders on how to handle charges, similar to the rules for federal government lawyers.
Who does this affect?
- U.S. Armed Forces members
What is the real world impact?
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Implements congressionally mandated legal updates
Updates the military justice system to align with the Military Justice Act of 2016. This ensures the rules for military trials and punishments are current with what Congress has required.
When does this start?
This order sets several different start dates for its various changes.
Initial Manual Changes
The first set of changes to the Manual for Courts-Martial (Annex 1) takes effect on March 1, 2018.
Main Military Justice Act Changes
Most changes from the Military Justice Act of 2016 and a second set of manual updates (Annex 2) take effect on January 1, 2019.
Changes to Specific UCMJ Articles
Changes to Articles 146 and 146a of the UCMJ will start after a report is submitted, but no later than December 1, 2018.

