sentences:  Clothing can reflect the character of the skaters' chosen music and must not "give the effect of excessive nudity inappropriate for the discipline".All men must wear trousers, a rule that has been in effect since the 1994–1995 season.Since 2003, women single skaters have been able to wear skirts, trousers, tights, and unitards, which was a change since the ISU requirement in 1988 that women skaters wear skirts during competition, a rule dubbed "the Katarina Rule", after East German skater Katarina Witt, who "skated her tapdance-based short program in a showgirl-style light blue sequined leotard with high-cut legs, low-cut chest, and similarly colored feathers on her headdress and sleeves and around the hips as the only perfunctionary gesture in the way of a skirt".