Use of this equipment is
The game officials are observed using headset communication equipment to speak with each other during a match the use of this equipment

- Allowed unless the state association has prohibited such equipment.

Explanation:

As per the question, the game officials are 'allowed to use the headset communication equipment' during a match until the use of such equipment is not restricted or prohibited by the state or sports association. In the given example, the game officials were witnessed using the equipment to communicate with each other as they were allowed to use it for important discussion or decision. However, if such equipment are being used after prohibition the officials may be subject penalty or other fatal consequences.