D.C. Mun. Regs. tit. 24, § 2317
2317.1 Upon discovering the loss, theft, or destruction of a registration certificate or firearm, the holder of the certificate shall immediately communicate this fact in writing or in person to the Firearms Registration Section in accordance with § 208 of the Act (D.C. Official Code § 7-2502.08 (2013 Supp.)).
2317.2 Each written communication concerning a certificate shall contain sufficient information to identify the holder.
2317.3 The filing of an offense report or complaint of a crime with respect to the loss, theft, or destruction of the certificate or weapon shall be deemed to be in compliance with this section.
2317.4 The holder of a destroyed, lost, or stolen certificate shall be issued a duplicate certificate without charge.
2317.5 The reissued certificate shall be prominently marked as a duplicate, and the issuance of the duplicate certificate shall automatically invalidate the lost, destroyed, or stolen certificate.
SOURCE: Final Rulemaking published at 23 DCR 8942 (May 6, 1977), incorporating text of the Proposed Rulemaking published at 23 DCR 7061, 7076 (March 4, 1977); 35 DCRR §317, November 1980, Special Edition; as amended by Final Rulemaking published at 60 DCR 17215 (December 27, 2013).