D.C. Code § 3-301

It is hereby declared to be the policy of the Congress that the District of Columbia National Guard Armory shall be maintained and operated primarily to provide facilities for the quartering and training of the District of Columbia National Guard, and, secondarily, to provide suitable facilities for major athletic events, conventions, concerts, such other activities as may be in the interest of the District of Columbia, including, but not limited to, the provision of emergency protection when the temperature falls below 32 degrees Fahrenheit, and that such Armory shall be operated as nearly as practicable on a self-supporting basis.