Each motor vehicle operated on the streets or highways shall be equipped with a device, in good operating condition, to register the rate of speed of the vehicle in motion; Provided, that vehicles manufactured prior to January 1934, for which proof is offered that machine parts for the maintenance of such devices are not available or where the manufacturer has dissolved or discontinued business, shall not be required to comply with this provision.
No television equipment shall be installed in or on any motor vehicle in a manner which will make the reception of the television visible to the vehicle operator while the vehicle is in motion.
D.C. Mun. Regs. tit. 18, r. 18-735