D.C. Mun. Regs. tit. 16, § 911
911.1 No licensee may accept a dangerous weapon (as defined by D.C. Official Code § 22-4501) as a pledge in a pawnbroker transaction unless the licensee has obtained, in addition to a pawnbroker's license, a license to deal in such weapons as required by D.C. Official Code § 22-4510.
911.2 Each pawnticket on any loan based upon the pledge of dangerous weapons shall be clearly marked on the face of the ticket as "not transferable" and state that the pledge is redeemable only by the pledgor who has placed the weapon in the custody of the licensee.
911.3 Redemption of a dangerous weapon pledged to secure a loan shall be made only in the manner provided for the transfer of dangerous weapons in D.C. Official Code § 22-4508.