D.C. Mun. Regs. tit. 3, § 509
509.1 Prior to the thirtieth (30th) day preceding an election, a qualified elector, or a person who is qualified to register (pursuant to D.C. Official Code § 1-1001.07 (a-2)) (2011 Repl.), may register to vote, or change his or her name, address, or party affiliation status by mailing a complete voter registration application to the Board.509.2 If the registration-by-mail deadline falls on a Saturday, Sunday, or holiday, the deadline shall be extended to the next business day.509.3 The Board shall immediately process mailed voter registration applications and registration update notifications received postmarked by not later than the thirtieth (30th) day preceding any election.509.4 Mailed voter registration applications and update notifications considered received during the thirty (30) days that immediately precede and include the date of the election shall be held and processed after the election.509.5 The Board shall immediately process timely completed non-postmarked voter registration applications and registration update notifications mailed and received not later than the twenty-third (23rd) day preceding any election.509.6 A voter registration application, or a notice of change of name, address, or party affiliation status, which is delivered by mail and postmarked by the United States Postal Service is considered received by the Board on the date of the postmark.509.7 A voter registration application, or a notice of change of name, address, or party affiliation status, shall be considered to be received by the Board:- (a) Upon acknowledgement of receipt by an agency date-stamp if it is delivered without a postmark; or
- (b) On the parcel's shipping date if it is delivered by common carrier.509.8 The Board will take reasonable steps to investigate the timely completion of non-postmarked voter registration applications, or notices of change of name, address, or party, by checking tracking numbers or any other information available.509.9 Individuals who have not previously voted in a federal election in the District and who register to vote by mail shall present, either at the time of registration, at the polling place, or when voting by mail, either a copy of a current and valid government photo identification, a copy of a current utility bill, bank statement, government check, paycheck, or other government document that shows the name
and address of the voter.
509.10 Subsection 509.9 shall not apply to:
(a) Individuals whose registration application includes either a driver's license number or at least the last four (4) digits of his or her social security number and with respect to whom the Board has been able to match the provided information with an existing identification record bearing the same number, name, and date of birth as provided in such registration application; and
(b) Individuals entitled to vote otherwise than in person under Federal law.
SOURCE: Final Rulemaking published at 43 DCR 1078, 1080 (March 1, 1996); as amended by Final Rulemaking published at 56 DCR 4738, 4740 (June 19, 2009); as amended by Final Rulemaking published at 57 DCR 3267, 3270 (April 16, 2010); as amended by Emergency and Proposed Rulemaking published at 57 DCR 7690 (August 20, 2010)[EXPIRED]; as amended by Final Rulemaking published at 57 DCR 11111, 111115(November 26, 2010); as amended by Emergency and Proposed Rulemaking published at 58 DCR 10752 (December 16, 2012)[EXPIRED]; as amended by Final Rulemaking published at 58 DCR 941, 944 (February 10, 2012).