As per Article 26 of the UNW Collective Agreement, callback is when an employee is recalled to a place of work for a specific duty but is not on standby. Each callback will be paid the greater of compensation at the overtime rate or compensation equivalent to four hours pay at straight time.

If an employee is on standby and is called out, for the first call-out he/she will be paid at least four hours at straight time. This minimum applies only ONCE during the standby period. After that, pay will be at the appropriate over time rate for the time worked, with a minimum of one hour paid for each call-out.