D.C. Code § 37-201.25

The Council of the District of Columbia is hereby authorized and empowered to establish tolerances and specifications for scales, weights, measures, weighing or measuring instruments or devices, and containers used in the District of Columbia. The Council shall prescribe and allow for barrels, containers, and packages, provided for in this subchapter the same specifications, variations, or tolerances that have been prescribed or established, or that may hereafter be prescribed or established for like barrels, containers, or packages by any officer of the United States in accordance with any requirement of an act of Congress.