D.C. Code § 1-1314
All spaces on any duly recorded plat of land thereon designated as streets, avenues, or alleys shall thereupon become public ways, provided they are made in conformity with § 1-1313.
Mar. 3, 1901, 31 Stat. 1428, ch. 854, § 1602
1973 Ed., § 1-614.
1981 Ed., § 1-914.