After reading the Hun today I see no real point locking him up. Would do more good just trying to work this mess in his hometown out. If there is a way to work it out.
Maybe the sub should be to replace a player who not performing. And the Emergencies that are names can replace player who is medically unfit. Don't know who would decide if a player was medically unfit.
Problem is whatever system is used some teams who bend rules to suit themselves.