The ceremonial scarf worn by Anglican priests, deacons, and lay readers is formally called a tippet, although it is often known colloquially as a "preaching scarf". It is worn with choir dress and hangs straight down at the front. Ordained clergy (bishops, priests and deacons) wear a black tippet, while readers (known in some dioceses as licensed lay ministers) wear a blue one. Commissioned evangelists of the Church Army are presented with a cherry red 'collar' type tippet, as a sign of authority to preach, but some replace this with a scarf form of the tippet, but retaining the distinctive red colour. A red tippet is also worn in some Anglican dioceses by commissioned lay workers.