when did the third brake light become law
Automotive lighting In the United States and Canada since 1986, in Australia and New Zealand since 1990, and in Europe and other countries applying UN Regulation 48 since 1998,[82] a central stop (brake) lamp mounted higher than the vehicle's left and right stop lamps and called a "centre high mount stop lamp (CHMSL)", is also required. The CHMSL (pronounced /ˈtʃɪmzəl/)[82] is sometimes informally called the "centre brake lamp", the "third brake light", the "eye-level brake lamp", the "safety brake lamp", or the "high-level brake lamp". The CHMSL may use one or more filament bulbs or LEDs, or a strip of neon tube as its light source.