Whenever a firearm is not being used it must be made temporarily inoperable, meaning that it is in a state such that a projectile cannot be fired.
In some cases (eg. for collectors) it may be necessary to have a weapon rendered permanently inoperable to meet the conditions of a licence. This means that the firearms will be made incapable of being discharged in a manner that is irreversible. Proof that a firearm has been rendered permanently inoperable will need to be supplied to Weapons Licensing.
A licensed Armourer is the only person authorised to render a firearm permanently inoperable, or certify that a weapon already is permanently inoperable. They can provide documentation confirming this (a Form 31).