The arms act does say “where practical” , see (e) bellow.
19B Conditions relating to storage of firearms in vehicles during transportation
(1)
Unless otherwise permitted by a member of the Police, if a firearms licence holder is transporting firearms or ammunition in a vehicle on a road or public access way,—
(a)
firearms must be concealed from view from outside of the vehicle; and
(b)
firearms must be made inoperable if readily possible by removing the bolt or another vital part (which should be kept on the licence holder’s person or stored out of sight separately from the firearms) or, if that is not possible (for example, because the firearm is a lever action or semi-automatic or single shot firearm), firearms must be fitted with a trigger lock or travel in a locked case or carry bag; and
(c)
firearms must not be loaded with ammunition in the breech, barrel, chamber, or magazine; and
(d)
ammunition must be concealed from view from outside of the vehicle; and
(e)
ammunition must be stored separately from any firearms and be in a locked glovebox or similar storage area where practicable.
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