Note that this standard has been updated and you will need to meet the requirements set out in AS 2593:2021 Boilers - Safety Management and Supervision Systems.
You will need to comply with this standard to operate boilers. It specifies the requirements for the operation of boilers, including unattended, limited attendance and fully attended.
If your boiler complies with certain requirements outlined in this standard, you may not be required to hold a high risk work licence for their operation.