Is it true that the Second Referee has the responsibility to inform the coach when his/her team's 15th through 18th substitutions have been reached?

The responsibility of informing the coach when their team reaches the 15th through 18th substitutions lies with the Second Referee as part of their duties during a match. This rule is significant because it ensures that coaches are aware of how many substitutions have been made, preventing any confusion about the team's remaining substitution options. Such awareness is important for effective game management and strategy, as the coach can make informed decisions regarding player rotations. By notifying the coach, the Second Referee helps maintain the flow of the game and ensures adherence to the substitution limits outlined in the rules. This communication is a key aspect of officiating, ensuring that the game is played fairly and within the established guidelines.