A planning authority does not incur any liability for, or in respect of, anything done, or omitted to be done, in accordance with (a) a bushfire hazard management plan, or other prescribed management plan relating to environmental hazards or natural hazards, that has been approved by an accredited person; or(b) a certificate issued by an accredited person or a State Service Agency stating that there is insufficient increase in risk from the environmental hazard or natural hazard to warrant any specific protection measures.