D.C. Mun. Regs. tit. 16, § 1004
1004.1 Each junk dealer and Class A dealer in secondhand personal property shall each day, except Sunday, before the hour of eleven o'clock in the forenoon (11:00 a.m.), deliver to the Chief of Police, or the Chiefs representative, on blank forms to be prescribed by the Mayor, a legible and correct transcript from the books provided for in §§ 1001, 1002, and 1003 showing an accurate and complete description of every article or thing received by that dealer and giving all numbers, marks, monograms, trade marks and manufacturer's names, and other marks of identification appearing on the same, on the business day next preceding.
1004.2 The provisions of § 1004.1 shall not apply to purchase of rags, bones, old iron and paper by junk dealers and Class A dealers in secondhand and personal property of which no record is required by this chapter to be kept.
1004.3 Class C secondhand dealers shall be exempt from the requirement of § 1004 except as to the purchase or receipt of those items listed in § 103.7.