D.C. Mun. Regs. tit. 3, § 512
512.1 A qualified uniformed services or overseas voter may use any federally- or District-approved voter registration application, including their electronic equivalents, to register to vote or update his or her registration. For the purpose of this section, a “voter registration application” shall include the following:
512.2 The Board shall process voter registration applications that are received electronically or mailed prior to the thirtieth (30th) day preceding an election, provided that the Board shall also process timely completed non-postmarked voter registration applications mailed and received not later than the twenty-third (23rd) day preceding any election.
512.3 A voter registration application 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.
512.4 A voter registration application delivered by common carrier will be considered received by the Board on the parcel’s shipping date.
512.5 A voter registration application delivered without a postmark is considered to be received by the Board upon acknowledgement of receipt by an agency date-stamp.
512.6 The Board will take reasonable steps to investigate the timely completion of non-postmarked voter registration applications by checking tracking numbers, or any other information available.
512.7 All voter registration applications 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.
SOURCE: Final Rulemaking published at 43 DCR 1078, 1080 (March 1, 1996); 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); as corrected by an Errata Notice published at 59 DCR 2457 (March 30, 2012).