No unlicensed person can access the Safe. If the police front up for a inspection and an unlicensed person opens the safe, kiss all the firearms on the property, along with licences goodbye.
My understanding is that firearms used for work in primary production can only be used on the said farm/property, must be signed out, used for specified job/work and signed back in by the licence holder. The licence holder must be present.
It's opened to too many interpretations. For example - "Possession or use of weapon by unlicensed person in primary production sometimes allowed". OK define "sometimes allowed".