Witt's taste in figure-skating costumes sometimes caused debate. At the 1983 European Championships, she skated her Mozart short program in knee breeches instead of a skirt. Her blue, skirtless feather-trimmed 1988 costume for a showgirl-themed short program was considered too theatrical and sexy, and led to a change in the ISU regulations dubbed the "Katarina rule" which required female skaters to wear more modest clothing; skirts were required to cover the buttocks and crotch.