What changes were made regarding athletes’ amateur and professional status at the 1994 Winter Olympics?

For the first time the International Olympic Committee allowed professional athletes to compete at the Olympics, in Lillehammer, Norway, in 1994. This had the largest impact on figure skating, as it enabled the return of past Olympic champions, including Brian Boitano, Katarina Witt, Jayne Torvill, Christopher Dean, and Yekaterina Gordeeva and Sergey Grinkov.