High Quality Content by WIKIPEDIA articles! Vehicle registration plates in Trinidad and Tobago are based on the type of vehicle and letter of the alphabet. Plates for each type are issued in alphabetical order, with the letters I, Q, and V excluded so as to avoid conflict with 1, O and diplomatic including the military and coast guard initials. Antique vehicles have a single letter,50's-70's have double letters ,80's-90's triple letters begin with PA,PB 90's-2000 and present is PC. The colors differ over the years from a black background with white markings then changed to white background with black markings then it changed to black background with silver markings and now reverted to black background with white writing using a different font.