All civil officers in the District shall, before they act as such, respectively take and subscribe an oath or affirmation to support the Constitution of the United States, and faithfully to discharge the duties of their respective offices; and the oath or affirmation provided for by this section shall be taken and subscribed, certified, and recorded, in such manner and form as may be prescribed by law.
D.C. Code § 1-501
Oath to be taken by officers
R.S., D.C., § 85; June 20, 1874, 18 Stat. 116, ch. 337, § 2; June 11, 1878, 20 Stat. 103, ch. 180, § 2
Official source: D.C. Law Library (Council of the District of Columbia). Reproduced from public-domain District of Columbia statutes; confirm against the official source for the current text. Not legal advice.