D.C. Mun. Regs. tit. 24, § 2310
2310.1 To establish age as required by §203(a)(1), a valid driver's license, birth certificate, or other government document requiring a date of birth under penalty of perjury shall be acceptable.
2310.2 A valid driver's license from any state, territory, or possession, or an international driver's license or one issued by the military shall, in the case of a new resident, be treated the same as if it had been issued by the District.
2310.3 When a District permit is obtained, the applicant shall communicate the permit number to the Firearms Registration Section.
2310.4 If a District permit is denied, the applicant shall immediately contact the Firearms Registration Section to schedule a vision test.
SOURCE: Final Rulemaking published at 23 DCR 8942 (May 6, 1977), incorporating text of the Proposed Rulemaking published at 23 DCR 7061, 7067 (March 4, 1977); 35 DCRR §306, November 1980, Special Edition.