Except as noted, substitutions shall be unlimited with the prior consent of the referee at the following times:
a. Prior to a throw-in when the ball is in possession of the team substituting. The opposing team may substitute as well if the team in possession is making a substitution.
b. Goal-kick – Either team;
c. After a goal has been scored and prior to the succeeding kick-off;
d. During the half-time interval;
e. Injury. If an injured is substituted, the opposing team may substitute one-for-one;
f. For a cautioned (Yellow Card) player at the time the caution is issued.