Reassigns many statutory duties and references concerning the District of Columbia militia/National Guard from federal officials to the Mayor of the District of Columbia. The bill updates an 1889 militia statute and makes matching changes across Title 10 and Title 32 of the U.S. Code and the District of Columbia Home Rule Act so that appointment, command-reference, retirement, activation, and courts-martial language names the Mayor rather than the President or Secretary of the Army.

The measure mainly replaces text in existing federal statutes and local law to reflect the Mayor as the named official for specified administrative and internal-military functions affecting the D.C. militia/Guard; it does not itself appropriate new money or create new programs, but it makes a number of technical, clerical, and jurisdictional changes that could affect command relationships, administrative processes, and interactions between federal and District authorities.