D.C. Mun. Regs. tit. 18, § 3021
3021.1 A person charged with a moving violation detected by an automated traffic enforcement system as that term is used in § 901 of the Fiscal Year 1997 Budget Support Act of 1996, effective April 9, 1996 (D.C. Law 11-198; D.C. Official Code § 40-751 et seq.), or a parking violation may contest the charge through an adjudication by mail, through the Department's website, or by appearing on a walk-in basis during regular business hours at a location designated by the Department.
3021.2 Letters, memoranda, affidavits, photographs, or other documentary materials shall be acceptable for the purposes of adjudication by mail, through the Department's website, or on a walk-in basis.
3021.3 The Director or his or her designee may exclude from consideration any material which is not relevant to the adjudication of the alleged infraction.
SOURCE: Final Rulemaking published at 48 DCR 7316 (August 10, 2001); as amended by the Traffic Adjudication Amendment Act of 2014, effective July 23, 2014 (D.C. Law 20-127; 61 DCR 5711 (June 6, 2014)).