The police uniform has remained the same since 1951. The standard uniform consists of olive pants with a black stripe down the side, a tan colored button-up shirt is worn, with long sleeves in winter and short sleeves in summer. A black tie is worn with the long-sleeve shirt. Some also wear black sweaters in cold weather. Class A uniforms consist of a dress blouse and Sam Browne belt. The ranks of trooper first class, corporal, sergeant, and first sergeant wear yellow chevrons showing their rank on both sleeves. Members of certain specialized units wear a military camouflage work uniform.