a. Possession of firearms, weapons, destructive devices, silencers, or explosives in a vehicle. When a firearm, weapon, destructive device, silencer, or explosive described in this chapter is found in a vehicle, it is presumed to be in the possession of the occupant if there is but one. If there is more than one occupant in the vehicle, it shall be presumed to be in the possession of all, except under the following circumstances:
(1) When it is found upon the person of one of the occupants, it shall be presumed to be in the possession of that occupant alone;
(2) When the vehicle is not a stolen one and the weapon or other instrument is found out of view in a glove compartment, trunk or other enclosed customary depository, it shall be presumed to be in the possession of the occupant or occupants who own or have authority to operate the vehicle; and
(3) When the vehicle is a taxicab and a weapon or other instrument is found in the passenger's portion of the vehicle, it shall be presumed to be in the possession of all the passengers, if there are any, and if not, in the possession of the driver.
b. Licenses and permits. When the legality of a person's conduct under this chapter depends on his possession of a license or permit or on his having registered with or given notice to a particular person or agency, it shall be presumed that he does not possess such a license or permit or has not registered or given the required notice, until he establishes the contrary.