In all games where the Instant Replay System (IRS) is used the head coach may request a head coach’s challenge, i. e. ask the nearest referee to verify the decision of referees by using the IRS to review the game situation.

For the head coach’s challenge the following procedure shall apply:

• The head coach shall be granted only one head coach’s challenge in a game, regardless of whether the challenge is successful or not.
• Only the game situations as in the Appendix F.3 may be challenged. 
• The head coach’s challenge may be requested at any time in the game.
• The head coach shall indicate to the nearest referee the game situation to be reviewed. 
• If the review provides the challenged decision is in favour of the requesting team the initial decision shall be overturned.
• If the review provides the challenged decision is not in favour of the requesting team the initial decision shall remain.

If the head coach requests the challenge it is recorded as follows:

• Click HCC button for the respective team:

• Select the action being challenged:

• Select if the challenge was successful/unsuccessful:

After the challenge HCC button becomes red and the Action Log includes the challenge action:

If another challenge is added for the same team, the challenge actions is flagged: