From next season Youth football will have Match Based Discipline the same as professional football, so instead of missing 7, 14, 21 or 28 days (or more) for being sent off you will now miss 1, 2 or 3 games like Wayne Rooney (more if you behave like Joey Barton!!) and it automatically comes in to affect 21 days after the offence.
http://www.thefa.com/TheFA/Disciplinary/NewsAndFeatures/2011/match-based-discipline-180411