'Substitutions
A player who is being substituted must leave the pitch by the nearest point on the touchline or byeline - unless the referee says he can leave quickly at the halfway line - or elsewhere for safety or injury reasons.
This change is to stop players time-wasting. Any player who "infringes the spirit of this law" will be booked for unsporting behaviour'
About time too.
This will stop after a season when players are constantly abused and have things thrown at them as they walk past the home fans.