66Occupier of premises or driver of vehicle deemed to be in possession of firearm, airgun, pistol, imitation firearm, restricted weapon, prohibited magazine, or explosive found therein

1. For the purposes of this Act every person in occupation of any land or building or the driver of any vehicle on which any firearm, airgun, pistol, imitation firearm, restricted weapon, prohibited magazine, or explosive is found shall, though not to the exclusion of the liability of any other person, be deemed to be in possession of that firearm, airgun, pistol, imitation firearm, restricted weapon, prohibited magazine, or explosive, unless he proves that it was not his property and that it was in the possession of some other person.