D.C. Mun. Regs. tit. 18, § 603
603.1 If, upon mechanical inspection of any vehicle, the Director determines that it conforms to the equipment standards contained in the current District Inspection Manual, and Chapter 7 of this Title, the Director shall issue to the registrant or person desiring registration an approved inspection sticker for a motor vehicle or trailer.
603.2 The inspection sticker will permit the operation and use of the motor vehicle or trailer until the registrant or person desiring registration is notified by the Director to present the motor vehicle or trailer for another inspection; Provided, that the registrant or other person has complied with the provisions of this title and all other applicable provisions of law.
603.3 If a registrant or a person who desires registration to whom an approved inspection sticker was issued, loses or disposes of his or her legal title to the vehicle, the person who acquires it, or that person's agent, may operate the vehicle bearing the sticker until such time as that person is required by the Director to present the vehicle for inspection; Provided, that the person has complied with the provisions of this title and all other applicable provisions of law.
603.4 Any Class A passenger vehicle that exhibits one or more of the following deficiencies upon inspection shall be issued an approved inspection sticker together with a warning that the vehicle will be rejected at the next inspection if the defects are not corrected:
(a) Missing, inaccurate, or mutilated registration document;
(b) Improper tag mounting;
(c) Damaged or rusted door, provided there are no visible holes;
(d) Damaged body;
(e) Minor dent on vehicle that does not affect the vehicle's operation;
(f) Missing or broken mirror on passenger side;
(g) Low decibel horn;
(h) Missing or broken gear indicator;
(i) Inoperative tag light;
(j) Inoperative clearance light;
(k) Inoperative tail light, provided the vehicle has three (3) operative tail lights;
(l) Inoperative stop light, provided the vehicle has three (3) operative stop lights;
(m) Inoperative marker lights;
(n) Inoperative fog lights;
(o) Damaged or missing rear or side reflectors;
(p) Minor cracked or damaged windshield, provided no crack or damaged portion is larger than three (3) inches in diameter; or
(q) Missing one (1) lug nut on tire.
SOURCE: Regulation No. 72-13 effective June 30, 1972, 32 DCRR § 4.205, Special Edition; as amended by Regulation 74-17 effective June 29, 1974; as amended by Final Rulemaking published at 50 DCR 8196 (October 3, 2003); as amended by Final Rulemaking published at 51 DCR 10224 (November 5, 2004).