Non interuptive subsitution

To not delay play, when a team want to make a substitution they notify the 4th official in the normal way and a board indicating the intended play to be subsituted is made public. Then;

• The substituting play enters the field of play wearing a coloured bib and they cannot participate in play until it is worn by the player to be subsituted.
• The substitte and the player being substituted exchange the bib, so that the subsitute can now enter play.
• The substituted player now wearing of if unable to through injury, now holding the bib, exits the field of play being unable to participate in play in any way. 
  
  The penalty for a player entering play when wearing or owning the bib will be a sending off, even if the player has been substituted.