"Approved" stickers, "rejection" stickers, "condemned" stickers, temporary inspection stickers, and temporary registration certificates for all motor vehicles other than autocycles, motorcycles, motor-driven cycles, and trailers shall be affixed to the windshield in the area of the right windshield wiper arm.
On small compacts and foreign cars on which the windshield lies in a flat plane, stickers and certificates may be affixed to the lower right-hand corner of the windshield.
"Approved" stickers, "rejection" stickers, "condemned" stickers, temporary inspection stickers and temporary registration certificates for motorcycles, motor-driven cycles, and trailers shall be affixed to the identification tag. Mounting tabs shall be bolted to either corner of the identification tag.
D.C. Mun. Regs. tit. 18, r. 18-607