§ 265.15 Presumptions of possession, unlawful intent and defacement.
  1.   The  presence  in any room, dwelling, structure or vehicle of any
machine-gun is presumptive evidence of its unlawful  possession  by  all
persons occupying the place where such machine-gun is found.
  2.   The  presence  in  any  stolen vehicle of any weapon, instrument,
appliance or substance specified in  sections  265.01,  265.02,  265.03,
265.04  and  265.05  is  presumptive  evidence  of its possession by all
persons occupying such vehicle at  the  time  such  weapon,  instrument,
appliance or substance is found.
  3. The presence in an automobile, other than a stolen one or a  public
omnibus,  of  any  firearm,  LARGE  CAPACITY  AMMUNITION FEEDING DEVICE,
defaced firearm, defaced rifle or shotgun, DEFACED LARGE CAPACITY  AMMU-
NITION  FEEDING  DEVICE, firearm silencer, explosive or incendiary bomb,
bombshell, gravity knife,  switchblade  knife,  pilum  ballistic  knife,
metal  knuckle  knife,  dagger,  dirk, stiletto, billy, blackjack, metal
knuckles, chuka stick, sandbag, sandclub  or  slungshot  is  presumptive
evidence  of  its possession by all persons occupying such automobile at
the time such weapon, instrument or appliance is found, except under the
following circumstances: (a) if such weapon, instrument or appliance  is
found upon the person of one of the occupants therein; (b) if such weap-
on,  instrument  or  appliance  is found in an automobile which is being
operated for hire by a duly licensed driver in the due, lawful and prop-
er pursuit of his OR HER trade, then such presumption shall not apply to
the  driver;  or  (c) if the weapon so found is a pistol or revolver and
one of the occupants, not present  under  duress,  has  in  his  OR  HER
possession a valid license to have and carry concealed the same.
  4.  The  possession  by  any  person  of the substance as specified in
section 265.04 is presumptive evidence of possessing such substance with
intent  to  use  the  same  unlawfully against the person or property of
another if such person  is  not  licensed  or  otherwise  authorized  to
possess  such  substance.  The  possession  by any person of any dagger,
dirk,  stiletto,  dangerous  knife  or  any  other  weapon,  instrument,
appliance  or substance designed, made or adapted for use primarily as a
weapon, is presumptive evidence of intent to  use  the  same  unlawfully
against another.
  5.  The  possession  by  any person of a defaced machine-gun, firearm,
rifle or shotgun is presumptive evidence that such  person  defaced  the
same.
  6.  The  possession  of  five  or  more  firearms  by  any  person  is
presumptive evidence that such person possessed the  firearms  with  the
intent to sell same.
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(For verification consult Official Text at Senate Gopher site.)