D.C. Mun. Regs. tit. 3, § 1108
1108.1 The Board shall post, by making available for public inspection, recall petitions or facsimiles of the petitions, in the office of the Board for ten (10) days, including Saturdays, Sundays, and holidays, beginning on the third (3rd) day after the petition has been accepted for filing.
1108.2 Any qualified elector may, within the ten (10) day posting period, challenge the validity of any petition by a written statement duly signed by the challenger and filed with the Board, specifying concisely the alleged defects in the petition.
1108.3 An elector may also challenge the validity of a recall petition by citing the exact provision(s) in the Board's regulations upon which the challenge is based; for example, if the ground upon which a signature is challenged is that the signature is not dated, such challenge shall be expressed as follows: "3 DCMR 1106.11(d)".
1108.4 The Board shall receive evidence in support of and in opposition to the challenge and shall determine the validity of the challenged petition not more than fifteen (15) days after the challenge has been filed.
1108.5 Petition challenges shall be adjudicated in accordance with the procedures prescribed in chapter 4 of this title and §§ 1108.6 and 1108.7 of this section.
1108.6 In the event a petition challenge is filed with the Board, the permanent registration records of the Board shall be searched by members of its staff and those staff persons shall be made available as witnesses to either party.
1108.7 The scope of the search shall be limited to matters raised in the petition challenge, including but not limited to, the following:
(a) Whether the signer is a registered elector;
(b) Whether the signature is that of a registered elector whose name appears on the petition; and
(c) Whether the signer is a resident of the ward, Advisory Neighborhood Commission Single-Member District or school district involved.
1108.8 The Board shall consider any other evidence as may be submitted, including but not limited to, documentary evidence, affidavits, and oral testimony.
1108.9 The Board, in view of the fact that it shall hear and determine the validity of the challenged petition within a limited time, may limit examination and cross-examination of witnesses to the following:
(a) Objections and specifications of such objections, if any, to the recall petition; and
(b) Objections and specifications of such objections, if any, to the petition challenge.
SOURCE: Final Rulemaking published at 42 D.C. Reg. 4419, 4431-32 (August 18, 1995); as amended by Final Rulemaking published at 47 D.C. Reg. 5927 (July 28, 2000); as amended by Final Rulemaking published at 48 D.C. Reg. 11722 (December 28, 2001); and further amended by Final Rulemaking published at 49 D.C. Reg. 2737 (March 22, 2002).