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. Code § 40-751 et seq.), or a parking violation may contest the charge through an adjudication by mail.
3021.2 Letters, memoranda, affidavits, photographs, or other documentary materials shall be acceptable for the purposes of adjudication by mail.
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).