The Uefa Europa league is the world governing body for football and soccer in Europe. They have implemented their recent overtime rules. They have implemented these rules to help keep players rested for longer periods of time.
Players that play multiple games in one day will have a 30 minute rest period during the duration of that game. For example, the soccer league might be the European Champions League soccer league, and the players would be rested for the entire duration of that game. This means that a player could play four games in a single day, resting for 30 minutes each time.