Interchange Area. Sub Box The only personnel allowed in the substitution boxes will be the 14 players participating in the game, plus up to 4 team officials (the coach, assistant coach, a manager, and one other official as required). All officials must be registered online via Mysideline and have the appropriate qualifications and working with children clearances as required. Authorisation from the Hornets Tournament Director must be gained for any other person(s) to be in the substitution box.