 Issued in a codice_15 format with white characters on a black background, there are no leading zeroes, and the letters I and O are not used.The codice_16 format is preceded by a codice_17 format introduced during large-scale procurement of road vehicles and armored cars for Commonwealth armed forces at the height of the Malayan Emergency, a derivative of the registration plate format for British armed forces vehicles circa the late-1940s and 1950s.Similar to its British counterpart, the codice_17 format was entirely incremental, except the Z designation indigenous to the region.