After receiving a yellow card, what must the head coach do?

The head coach must remain seated for the rest of the match after receiving a yellow card. This rule is in place to ensure that the coach's behavior is appropriately regulated and to maintain the decorum of the match. Receiving a yellow card indicates that a warning has been issued for unacceptable behavior or actions, and keeping the coach seated helps to prevent further issues or disturbances during the game.

Remaining in a seated position ensures that the coach cannot interact with officials or players from the sidelines, which maintains the integrity of the match. This practice emphasizes the importance of discipline and respect for the game, helping to create a fair environment for all participants.

Directing an assistant to coach from the sidelines or standing only during time-outs would not align with the protocol after receiving a yellow card, as these actions could contribute to similar infractions that led to the card being issued in the first place.