Sillitoe tartan is the nickname given to the distinctive black and white chequered pattern, correctly known as dicing, which was originally associated with the police in Scotland. It later gained widespread use in the rest of the United Kingdom and overseas, notably in Australia and New Zealand, as well as Chicago and Pittsburgh in the United States. It is used occasionally elsewhere, including by some Spanish municipal police and in parts of Canada, where it is limited to auxiliary police services. Based on the diced bands seen on the Glengarries that are worn by several Scottish regiments of the British Army, the pattern was first adopted for police use in 1932 by Sir Percy Sillitoe, Chief Constable of the City of Glasgow Police. The Sillitoe pattern may be composed of several different colours and numbers of rows depending on local customs, but when incorporated into uniforms or vehicle livery, it serves to uniquely identify emergency services personnel to the public. Usage by country Australia Blue and white chequers have become the ubiquitous symbol of policing in Australia. The pattern was introduced into Australia by the Commissioner of the South Australia Police in 1961, following a fact-finding tour of Glasgow in 1960. Committee member Sgt. W Rodgers suggested the inclusion during his time in SA Police, as he had observed during his earlier years in England. The police forces of the remaining states and territories progressively adopted the pattern during the 1970s until it was displayed on all Australian police uniforms except that of the Australian Federal Police, who use a black and white Sillitoe tartan on their cap bands. The Australasian Centre for Policing Research (ACPR) approved a national specification for police vehicle markings in 1995 which saw all vehicles marked with a chequer band stripe running the full length of the vehicle. This was adopted by all states with the exception of New South Wales which eventually adopted the national standard in 2002. Other coloured chequered patterns may be used to denote other emergency services and particular usage varies from state to state. For example, in New South Wales the Ambulance Service uses red and white chequers on ambulances and paramedic's uniforms, while the State Emergency Service uses orange and white Sillitoe tartan. St John Ambulance uses a white and green pattern on their vehicles and operational uniforms in both South Australia and Victoria. In New South Wales the