To extend to the Mayor of the District of Columbia the same authority with respect to the National Guard of the District of Columbia as the Governors of the several States exercise with respect to the National Guard of those States.

Makes the Mayor of the District of Columbia the Commander-in-Chief of the District's militia in lieu of the President. Grants to the Mayor: (1) administrative authority with respect to the reserve corps of the District's National Guard; (2) authority to appoint and commission the militia's Commanding General, Adjutant General, and all other commissioned officers; and (3) sole authority to call for duty a portion of the militia to suppress a riot in the District.