Hair must be neat. For females, hair must be tied back when it is a safety issue. For males, hair must be above the collar and cut to mid-ear length at the sides. Jewellery should be worn in moderation. Women may wear one earring of the same size in each ear. Men may wear one small stud or ring. Other facial jewellery or exposed body piercings must be removed while at work, such as tongue rings or studs. Personal hygiene is important and aftershave and perfume should be kept to a minimum.