By playing the Classic Match game option, you will follow the regular rules of football, and there will be no special or extraordinary rules.
This game mode will allow you 5 substitutions per match.
How to Play Classic Match in FC 24?
In EA FC game Kick-off mode, Classic Match option is available under Classic Match option.
In Ultimate Team, Classic Match mode is available under Ultimate Team > PLAY > FRIENDLIES (Couch Play / Play Online / Play A Friend) section.