Prior to the 1992 semi-finals, the only semi-final played under different rules to this was the rearranged 1989 semi-final between Liverpool and Nottingham Forest, for which it had been declared in advance that the game would be decided by extra time and penalties if necessary due to the Hillsborough Stadium disaster.
Prior to the 1992 semi-finals, there was a unique semi-final that deviated from the standard rules, specifically the rearranged 1989 semi-final between Liverpool and Nottingham Forest, which had been predetermined to be decided by extra time and penalties in light of the Hillsborough Stadium disaster.